DES Data Encryption standard
|
|
- Dominic Horn
- 6 years ago
- Views:
Transcription
1 DES Data Encryption standard DES was developed by IBM as a modification of an earlier system Lucifer DES was adopted as a standard in 1977 Was replaced only in 2001 with AES (Advanced Encryption Standard) DES characteristics: key size is 56 bits (input as a 64-bit value, where every 8 th bit is parity on the preceding 7 bits) block size is 64 bits number of rounds is 16
2 DES The standard is public, the design criteria is classified One of the biggest controversies is the key size (56 bits) W. Diffie, M. Hellman "Exhaustive Cryptanalysis of the NBS Data Encryption Standard" IEEE Computer 10(6), June 1977, pp74-84 M. Hellman "DES will be totally insecure within ten years" IEEE Spectrum 16(7), July 1979, pp Another controversy: is there a back door?
3 SDES DES comparison SDES DES Key 9 bits 56 bits( + 8 parity bits) Block size Left (right) block size 6 bits 32 bits Expander function From 6 bits to 8 bits From 32 bits to 48 bits Key size reduction From 9 bits to 8 bits From 56 bits to 48 bits Initial permutation no yes Number of S boxes 2 8 Input in S - box 4 bits 6 bits Output from S - box 3 bits 4 bits Permutation boxes no Yes ( 8 P-boxes) Final permutation no yes
4 DES algorithm Plaintext Initial Permutation Left 32-bits Right 32-bits Expansion XOR S-Box K i Permutation - Box New left New right Inverse of the Initial Permutation XOR 16 iterations using a different round-key Ciphertext
5 KEY function 56 bit key + parity bits (64 bit key) Remove the parity bits, Permute the 56 bit key 28 bit left half 28 bit right half C 0 D 0 C i =LS i (C i-1 ) Left shift circular Left shift circular D i = LS i (D i-1 ) K i Compression/Permutation 48 bit round key for ROUND i
6 Key Permutation 1. The parity bits are discarded and the remaining bits are permuted by the following table: 57, 49, 41, 33, 25, 17, 09, 01, 58, 50, 42, 34, 26, 18 10, 02, 59, 51, 43, 35, 27, 19, 11, 03, 60, 52, 44, 36 63, 55, 47, 39, 31, 23, 15, 07, 62, 54, 46, 38, 30, 22 14, 06, 61, 53, 45, 37, 29, 21, 13, 05, 28, 20, 12, The 56 bit result is split in two halves (left and right)
7 Number of Key Bits Shifted per Round Round: Shift: After the shift, 48 of the 56 bits are selected using a 56 bit to 48 bit compression permutation.
8 Compression permutation Compression permutation 14, 17, 11, 24, 01, 05, 03, 28, 15, 06, 21, 10 23, 19, 12, 04, 26, 08, 16, 07, 27, 20, 13, 02 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32 After 16 rounds of all round-keys are generated.
9 Initial permutation Initial permutation: 58, 50, 42, 34, 26, 18, 10, 02, 60, 52, 44, 36, 28, 20, 12, 04 62, 54, 46, 38, 30, 22, 14, 06, 64, 56, 48, 40, 32, 24, 16, 08 57, 49, 41, 33, 25, 17, 09, 01, 59, 51, 43, 35, 27, 19, 11, 03 61, 53, 45, 37, 29, 21, 13, 05, 63, 55, 47, 39, 31, 23, 15, 07 The initial permutation and the final permutation do not affect the security of DES. Its primary purpose is to make it easier to load plaintext and ciphertext data into a DES chip in byte sized pieces.
10 Expansion function The expansion mapping is: 32, 01, 02, 03, 04, 05, 04, 05, 06, 07, 08, 09 08, 09, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17 16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25 24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 01 Example: Input bit 03 is moved to position 04 in the output (permutation, no expansion). Bit 09 is moved to positions 12, and 14, (permutation and expansion).
11 S boxes 48-Bit Input S-box 1 S-box 8 32-Bit output Input to S-Box is a 6-bit value used to look up a 4-Bit output from a 4- row, 16 column table in the S-Box. If we label the inputs a 1, a 2, a 3, a 4, a 5, a 6 then a 1 and a 6 specify a row; a 2, a 3, a 4, a 5 specify the column.
12 S boxes (cont.) The output is the value stored in the table at the intersection of the row and column. The S1-Box 1 is: 14, 04, 13, 01, 02, 15, 11, 08, 03, 10, 06, 12, 05, 09, 00, 07 00, 15, 07, 04, 14, 02, 13, 01, 10, 06, 12, 11, 09, 05, 03, 08 04, 01, 14, 08, 13, 06, 02, 11, 15, 12, 09, 07, 03, 10, 05, 00 15, 12, 08, 02, 04, 09, 01, 07, 05, 11, 03, 14, 10, 00, 06, 13 Each S-Box holds a different mapping (i.e., a different table). Example: S1-box input: = row 2, 1101 = column 13. S1-box output: 0101
13 Permutation - Box The output of the S-box is sent to the Permutation-Box : 16, 07, 20, 21, 29, 12, 28, 17, 01, 15, 23, 26, 05, 18, 31, 10 02, 08, 24, 14, 32, 27, 03, 09, 19, 13, 30, 06, 22, 11, 04, 25 The total is 32 bits (16 per row). The output of the P-Box is XORed with the left half of the initial 64 bit block. Then the left and the right halves are switched and another round begins. This continues for 16 total rounds with each round using a different round-key. Example: Bit 21 moves to bit 4, while bit 4 moves to bit 31.
14 Attacks on DES Brute force attack. In 1990s RSA Laboratories called several DES challenges Challenge II-2 was announced in 1998 The winner was Electronic Frontier Foundation (EFF) They built a DES Cracker machine for less than $250,000 It found the key in 56 hours and searched 88 billion keys per second
15 Attacks on DES RSA Laboratories called Challenge III in 1999 was solved in a record time cooperative effort of the DES Cracker and a worldwide network of 100,000 computers the key was found in 22 hours 15 minutes over 245 billion keys were tested per second
16 Attacks on DES Differential cryptanalysis: (1) attack on 8-round DES requires 2^38 known plaintext-ciphertext pairs (2) attack on 16-round DES requires 2^47 chosen plaintexts Cryptanalysis is not effective against DES
Chapter 4 The Data Encryption Standard
Chapter 4 The Data Encryption Standard History of DES Most widely used encryption scheme is based on DES adopted by National Bureau of Standards (now National Institute of Standards and Technology) in
More informationCryptanalysis of Ladder-DES
Cryptanalysis of Ladder-DES Computer Science Department Technion - srael nstitute of Technology Haifa 32000, srael Email: biham@cs.technion, ac.il WWW: http://www.cs.technion.ac.il/-biham/ Abstract. Feistel
More informationDUBLIN CITY UNIVERSITY
DUBLIN CITY UNIVERSITY SEMESTER ONE EXAMINATIONS 2013 MODULE: (Title & Code) CA642 Cryptography and Number Theory COURSE: M.Sc. in Security and Forensic Computing YEAR: 1 EXAMINERS: (Including Telephone
More informationBlock Ciphers Security of block ciphers. Symmetric Ciphers
Lecturers: Mark D. Ryan and David Galindo. Cryptography 2016. Slide: 26 Assume encryption and decryption use the same key. Will discuss how to distribute key to all parties later Symmetric ciphers unusable
More informationNetwork Security: Secret Key Cryptography
1 Network Security: Secret Key Cryptography Henning Schulzrinne Columbia University, New York schulzrinne@cs.columbia.edu Columbia University, Fall 2000 cfl1999-2000, Henning Schulzrinne Last modified
More informationJournal of Discrete Mathematical Sciences & Cryptography Vol. ( ), No., pp. 1 10
Dynamic extended DES Yi-Shiung Yeh 1, I-Te Chen 2, Ting-Yu Huang 1, Chan-Chi Wang 1, 1 Department of Computer Science and Information Engineering National Chiao-Tung University 1001 Ta-Hsueh Road, HsinChu
More informationDr. V.U.K.Sastry Professor (CSE Dept), Dean (R&D) SreeNidhi Institute of Science & Technology, SNIST Hyderabad, India. P = [ p
Vol., No., A Block Cipher Involving a Key Bunch Matrix and an Additional Key Matrix, Supplemented with XOR Operation and Supported by Key-Based Permutation and Substitution Dr. V.U.K.Sastry Professor (CSE
More informationNew Linear Cryptanalytic Results of Reduced-Round of CAST-128 and CAST-256
New Linear Cryptanalytic Results of Reduced-Round of CAST-28 and CAST-256 Meiqin Wang, Xiaoyun Wang, and Changhui Hu Key Laboratory of Cryptologic Technology and Information Security, Ministry of Education,
More informationCOS433/Math 473: Cryptography. Mark Zhandry Princeton University Spring 2017
COS433/Math 473: Cryptography Mark Zhandry Princeton University Spring 2017 Previously Pseudorandom Functions and Permutaitons Modes of Operation Pseudorandom Functions Functions that look like random
More informationCourse Business. Harry. Hagrid. Homework 2 Due Now. Midterm is on March 1. Final Exam is Monday, May 1 (7 PM) Location: Right here
Course Business Homework 2 Due Now Midterm is on March 1 Final Exam is Monday, May 1 (7 PM) Location: Right here Harry Hagrid 1 Cryptography CS 555 Topic 17: DES, 3DES 2 Recap Goals for This Week: Practical
More informationExplaining Differential Fault Analysis on DES. Christophe Clavier Michael Tunstall
Explaining Differential Fault Analysis on DES Christophe Clavier Michael Tunstall 5/18/2006 References 2 Bull & Innovatron Patents Fault Injection Equipment: Laser 3 Bull & Innovatron Patents Fault Injection
More informationClassification of Ciphers
Classification of Ciphers A Thesis Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Technology by Pooja Maheshwari to the Department of Computer Science & Engineering Indian
More informationV.Sorge/E.Ritter, Handout 2
06-20008 Cryptography The University of Birmingham Autumn Semester 2015 School of Computer Science V.Sorge/E.Ritter, 2015 Handout 2 Summary of this handout: Symmetric Ciphers Overview Block Ciphers Feistel
More informationHigh Diffusion Cipher: Encryption and Error Correction in a Single Cryptographic Primitive
High Diffusion Cipher: Encryption and Error Correction in a Single Cryptographic Primitive Chetan Nanjunda Mathur, Karthik Narayan and K.P. Subbalakshmi Department of Electrical and Computer Engineering
More informationB. Substitution Ciphers, continued. 3. Polyalphabetic: Use multiple maps from the plaintext alphabet to the ciphertext alphabet.
B. Substitution Ciphers, continued 3. Polyalphabetic: Use multiple maps from the plaintext alphabet to the ciphertext alphabet. Non-periodic case: Running key substitution ciphers use a known text (in
More informationCryptanalysis on short messages encrypted with M-138 cipher machine
Cryptanalysis on short messages encrypted with M-138 cipher machine Tsonka Baicheva Miroslav Dimitrov Institute of Mathematics and Informatics Bulgarian Academy of Sciences 10-14 July, 2017 Sofia Introduction
More informationSecret Key Systems (block encoding) Encrypting a small block of text (say 128 bits) General considerations for cipher design:
Secret Key Systems (block encoding) Encrypting a small block of text (say 128 bits) General considerations for cipher design: Secret Key Systems (block encoding) Encrypting a small block of text (say 128
More informationTMA4155 Cryptography, Intro
Trondheim, December 12, 2006. TMA4155 Cryptography, Intro 2006-12-02 Problem 1 a. We need to find an inverse of 403 modulo (19 1)(31 1) = 540: 540 = 1 403 + 137 = 17 403 50 540 + 50 403 = 67 403 50 540
More informationTowards a Cryptanalysis of Scrambled Spectral-Phase Encoded OCDMA
Towards a Cryptanalysis of Scrambled Spectral-Phase Encoded OCDMA Sharon Goldberg* Ron Menendez **, Paul R. Prucnal* *, **Telcordia Technologies OFC 27, Anaheim, CA, March 29, 27 Secret key Security for
More informationElGamal Public-Key Encryption and Signature
ElGamal Public-Key Encryption and Signature Çetin Kaya Koç koc@cs.ucsb.edu Çetin Kaya Koç http://koclab.org Winter 2017 1 / 10 ElGamal Cryptosystem and Signature Scheme Taher ElGamal, originally from Egypt,
More informationCDMA Physical Layer Built-in Security Enhancement
CDMA Physical Layer Built-in Security Enhancement Jian Ren Tongtong Li 220 Engineering Building Department of Electrical & Computer Engineering Michigan State University East Landing, MI 48864-226 Email:
More information4. Design Principles of Block Ciphers and Differential Attacks
4. Design Principles of Block Ciphers and Differential Attacks Nonli near 28-bits Trans forma tion 28-bits Model of Block Ciphers @G. Gong A. Introduction to Block Ciphers A Block Cipher Algorithm: E and
More informationLecture 1: Introduction
Lecture 1: Introduction Instructor: Omkant Pandey Spring 2018 (CSE390) Instructor: Omkant Pandey Lecture 1: Introduction Spring 2018 (CSE390) 1 / 13 Cryptography Most of us rely on cryptography everyday
More informationEE 418: Network Security and Cryptography
EE 418: Network Security and Cryptography Homework 3 Solutions Assigned: Wednesday, November 2, 2016, Due: Thursday, November 10, 2016 Instructor: Tamara Bonaci Department of Electrical Engineering University
More informationCryptography Math 1580 Silverman First Hour Exam Mon Oct 2, 2017
Name: Cryptography Math 1580 Silverman First Hour Exam Mon Oct 2, 2017 INSTRUCTIONS Read Carefully Time: 50 minutes There are 5 problems. Write your name legibly at the top of this page. No calculators
More informationClassical Cryptography
Classical Cryptography CS 6750 Lecture 1 September 10, 2009 Riccardo Pucella Goals of Classical Cryptography Alice wants to send message X to Bob Oscar is on the wire, listening to all communications Alice
More informationCryptography. Module in Autumn Term 2016 University of Birmingham. Lecturers: Mark D. Ryan and David Galindo
Lecturers: Mark D. Ryan and David Galindo. Cryptography 2017. Slide: 1 Cryptography Module in Autumn Term 2016 University of Birmingham Lecturers: Mark D. Ryan and David Galindo Slides originally written
More informationThe number theory behind cryptography
The University of Vermont May 16, 2017 What is cryptography? Cryptography is the practice and study of techniques for secure communication in the presence of adverse third parties. What is cryptography?
More informationDiffie-Hellman key-exchange protocol
Diffie-Hellman key-exchange protocol This protocol allows two users to choose a common secret key, for DES or AES, say, while communicating over an insecure channel (with eavesdroppers). The two users
More informationTriple-DES Block of 96 Bits: An Application to. Colour Image Encryption
Applied Mathematical Sciences, Vol. 7, 2013, no. 23, 1143-1155 HIKARI Ltd, www.m-hikari.com Triple-DES Block of 96 Bits: An Application to Colour Image Encryption V. M. Silva-García Instituto politécnico
More informationVernam Encypted Text in End of File Hiding Steganography Technique
Vernam Encypted Text in End of File Hiding Steganography Technique Wirda Fitriani 1, Robbi Rahim 2, Boni Oktaviana 3, Andysah Putera Utama Siahaan 4 1,4 Faculty of Computer Science, Universitas Pembanguan
More informationDATA SECURITY USING ADVANCED ENCRYPTION STANDARD (AES) IN RECONFIGURABLE HARDWARE FOR SDR BASED WIRELESS SYSTEMS
INTERNATIONAL JOURNAL OF COMPUTER ENGINEERING & TECHNOLOGY (IJCET) International Journal of Computer Engineering and Technology (IJCET), ISSN 0976-6367(Print), ISSN 0976 6367(Print) ISSN 0976 6375(Online)
More informationCryptography CS 555. Topic 20: Other Public Key Encryption Schemes. CS555 Topic 20 1
Cryptography CS 555 Topic 20: Other Public Key Encryption Schemes Topic 20 1 Outline and Readings Outline Quadratic Residue Rabin encryption Goldwasser-Micali Commutative encryption Homomorphic encryption
More informationTime-Memory Trade-Offs for Side-Channel Resistant Implementations of Block Ciphers. Praveen Vadnala
Time-Memory Trade-Offs for Side-Channel Resistant Implementations of Block Ciphers Praveen Vadnala Differential Power Analysis Implementations of cryptographic systems leak Leaks from bit 1 and bit 0 are
More informationGeneration of AES Key Dependent S-Boxes using RC4 Algorithm
3 th International Conference on AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT- 3, May 26 28, 29, E-Mail: asat@mtc.edu.eg Military Technical College, Kory Elkoah, Cairo, Egypt Tel : +(22) 2425292 243638,
More informationMA 111, Topic 2: Cryptography
MA 111, Topic 2: Cryptography Our next topic is something called Cryptography, the mathematics of making and breaking Codes! In the most general sense, Cryptography is the mathematical ideas behind changing
More informationChained Permutations. Dylan Heuer. North Dakota State University. July 26, 2018
Chained Permutations Dylan Heuer North Dakota State University July 26, 2018 Three person chessboard Three person chessboard Three person chessboard Three person chessboard - Rearranged Two new families
More informationOFDM Based Low Power Secured Communication using AES with Vedic Mathematics Technique for Military Applications
OFDM Based Low Power Secured Communication using AES with Vedic Mathematics Technique for Military Applications Elakkiya.V 1, Sharmila.S 2, Swathi Priya A.S 3, Vinodha.K 4 1,2,3,4 Department of Electronics
More informationImage Encryption Based on the Modified Triple- DES Cryptosystem
International Mathematical Forum, Vol. 7, 2012, no. 59, 2929-2942 Image Encryption Based on the Modified Triple- DES Cryptosystem V. M. SILVA-GARCÍA 1, R. FLORES-CARAPIA 2, I. LÓPEZ-YAÑEZ 3 and C. RENTERÍA-MÁRQUEZ
More informationRecommendations for Secure IC s and ASIC s
Recommendations for Secure IC s and ASIC s F. Mace, F.-X. Standaert, J.D. Legat, J.-J. Quisquater UCL Crypto Group, Microelectronics laboratory(dice), Universite Catholique de Louvain(UCL), Belgium email:
More informationProposal of New Block Cipher Algorithm. Abstract
Proposal of New Block Cipher Algorithm Prof. Dr. Hilal Hadi Salih Dr. Ahmed Tariq Sadiq M.Sc.Alaa K.Frhan Abstract Speed and complexity are two important properties in the block cipher. The block length
More informationEncryption at the Speed of Light? Towards a cryptanalysis of an optical CDMA encryption scheme
Encryption at the Speed of Light? Towards a cryptanalysis of an optical CDMA encryption scheme Sharon Goldberg * Ron Menendez **, Paul R. Prucnal * *, ** Telcordia Technologies IPAM Workshop on Special
More informationCourse Developer: Ranjan Bose, IIT Delhi
Course Title: Coding Theory Course Developer: Ranjan Bose, IIT Delhi Part I Information Theory and Source Coding 1. Source Coding 1.1. Introduction to Information Theory 1.2. Uncertainty and Information
More informationQuality of Encryption Measurement of Bitmap Images with RC6, MRC6, and Rijndael Block Cipher Algorithms
International Journal of Network Security, Vol.5, No.3, PP.241 251, Nov. 2007 241 Quality of Encryption Measurement of Bitmap Images with RC6, MRC6, and Rijndael Block Cipher Algorithms Nawal El-Fishawy
More informationIntroduction to Cryptography
B504 / I538: Introduction to Cryptography Spring 2017 Lecture 10 Assignment 2 is due on Tuesday! 1 Recall: Pseudorandom generator (PRG) Defⁿ: A (fixed-length) pseudorandom generator (PRG) with expansion
More informationSolution: Alice tosses a coin and conveys the result to Bob. Problem: Alice can choose any result.
Example - Coin Toss Coin Toss: Alice and Bob want to toss a coin. Easy to do when they are in the same room. How can they toss a coin over the phone? Mutual Commitments Solution: Alice tosses a coin and
More informationHardware Bit-Mixers. Laszlo Hars January, 2016
Hardware Bit-Mixers Laszlo Hars January, 2016 Abstract A new concept, the Bit-Mixer is introduced. It is a function of fixed, possibly different size of input and output, which computes statistically uncorrelated
More informationPublic Key Cryptography Great Ideas in Theoretical Computer Science Saarland University, Summer 2014
7 Public Key Cryptography Great Ideas in Theoretical Computer Science Saarland University, Summer 2014 Cryptography studies techniques for secure communication in the presence of third parties. A typical
More informationMerkle s Puzzles. c Eli Biham - May 3, Merkle s Puzzles (8)
Merkle s Puzzles See: Merkle, Secrecy, Authentication, and Public Key Systems, UMI Research press, 1982 Merkle, Secure Communications Over Insecure Channels, CACM, Vol. 21, No. 4, pp. 294-299, April 1978
More informationAES Encryption and Decryption in Microsoft.NET
AES Encryption and Decryption in Microsoft.NET William J. Buchanan Centre for Distributed Computing and Security, Edinburgh Napier University {w.buchanan}@napier.ac.uk http://cdcs.napier.ac.uk Abstract.
More informationMeet-in-the-Middle Attacks on Reduced-Round Midori-64
Meet-in-the-Middle Attacks on Reduced-Round Midori-64 Li Lin and Wenling Wu Trusted Computing and Information Assurance Laboratory, Institute of Software, Chinese Academy of Sciences, Beijing 100190, China
More informationIND-CCA Secure Hybrid Encryption from QC-MDPC Niederreiter
IND-CCA Secure Hybrid Encryption from QC-MDPC Niederreiter 7 th International Conference on Post-Quantum Cryptography 2016 Ingo von Maurich 1, Lukas Heberle 1, Tim Güneysu 2 1 Horst Görtz Institute for
More informationColored Image Ciphering with Key Image
EUROPEAN ACADEMIC RESEARCH Vol. IV, Issue 5/ August 2016 ISSN 2286-4822 www.euacademic.org Impact Factor: 3.4546 (UIF) DRJI Value: 5.9 (B+) Colored Image Ciphering with Key Image ZAINALABIDEEN ABDULLASAMD
More informationDifferential Cryptanalysis of REDOC III
Differential Cryptanalysis of REDOC III Ken Shirriff Address: Sun Microsystems Labs, 2550 Garcia Ave., MS UMTV29-112, Mountain View, CA 94043. Ken.Shirriff@eng.sun.com Abstract: REDOC III is a recently-developed
More informationVoice and image encryption, and performance analysis of counter mode advanced encryption standard for WiMAX
The University of Toledo The University of Toledo Digital Repository Theses and Dissertations 2013 Voice and image encryption, and performance analysis of counter mode advanced encryption standard for
More informationData security (Cryptography) exercise book
University of Debrecen Faculty of Informatics Data security (Cryptography) exercise book 1 Contents 1 RSA 4 1.1 RSA in general.................................. 4 1.2 RSA background.................................
More informationSIDE-CHANNEL attacks exploit the leaked physical information
546 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II: EXPRESS BRIEFS, VOL. 57, NO. 7, JULY 2010 A Low Overhead DPA Countermeasure Circuit Based on Ring Oscillators Po-Chun Liu, Hsie-Chia Chang, Member, IEEE,
More informationKeywords: dynamic P-Box and S-box, modular calculations, prime numbers, key encryption, code breaking.
INTRODUCING DYNAMIC P-BOX AND S-BOX BASED ON MODULAR CALCULATION AND KEY ENCRYPTION FOR ADDING TO CURRENT CRYPTOGRAPHIC SYSTEMS AGAINST THE LINEAR AND DIFFERENTIAL CRYPTANALYSIS M. Zobeiri and B. Mazloom-Nezhad
More informationGeneric Attacks on Feistel Schemes
Generic Attacks on Feistel Schemes -Extended Version- Jacques Patarin PRiSM, University of Versailles, 45 av. des États-Unis, 78035 Versailles Cedex, France This paper is the extended version of the paper
More informationA Novel Encryption System using Layered Cellular Automata
A Novel Encryption System using Layered Cellular Automata M Phani Krishna Kishore 1 S Kanthi Kiran 2 B Bangaru Bhavya 3 S Harsha Chaitanya S 4 Abstract As the technology is rapidly advancing day by day
More informationSOME OBSERVATIONS ON AES AND MINI AES. Hüseyin Demirci TÜBİTAK UEKAE
SOME OBSERVTIONS ON ES ND MINI ES Hüseyin Demirci huseyind@uekae.tubitak.gov.tr TÜBİTK UEKE OVERVIEW OF THE PRESENTTION Overview of Rijndael and the Square ttack Half Square Property of Rijndael dvanced
More informationMath 1111 Math Exam Study Guide
Math 1111 Math Exam Study Guide The math exam will cover the mathematical concepts and techniques we ve explored this semester. The exam will not involve any codebreaking, although some questions on the
More informationBijective Function with Domain in N and Image in the Set of Permutations: An Application to Cryptography
IJCSNS International Journal of Computer Science and Network Security, VOL.7 No.4, April 2007 7 Bijective Function with Domain in N and Image in the Set of Permutations: An Application to Cryptography
More informationReversible data hiding based on histogram modification using S-type and Hilbert curve scanning
Advances in Engineering Research (AER), volume 116 International Conference on Communication and Electronic Information Engineering (CEIE 016) Reversible data hiding based on histogram modification using
More informationConditional Cube Attack on Reduced-Round Keccak Sponge Function
Conditional Cube Attack on Reduced-Round Keccak Sponge Function Senyang Huang 1, Xiaoyun Wang 1,2,3, Guangwu Xu 4, Meiqin Wang 2,3, Jingyuan Zhao 5 1 Institute for Advanced Study, Tsinghua University,
More informationChapter 4 MASK Encryption: Results with Image Analysis
95 Chapter 4 MASK Encryption: Results with Image Analysis This chapter discusses the tests conducted and analysis made on MASK encryption, with gray scale and colour images. Statistical analysis including
More informationII. RC4 Cryptography is the art of communication protection. This art is scrambling a message so it cannot be clear; it
Enhancement of RC4 Algorithm using PUF * Ziyad Tariq Mustafa Al-Ta i, * Dhahir Abdulhade Abdullah, Saja Talib Ahmed *Department of Computer Science - College of Science - University of Diyala - Iraq Abstract:
More informationBackground. Game Theory and Nim. The Game of Nim. Game is Finite 1/27/2011
Background Game Theory and Nim Dr. Michael Canjar Department of Mathematics, Computer Science and Software Engineering University of Detroit Mercy 26 January 2010 Nimis a simple game, easy to play. It
More informationError Protection: Detection and Correction
Error Protection: Detection and Correction Communication channels are subject to noise. Noise distorts analog signals. Noise can cause digital signals to be received as different values. Bits can be flipped
More informationDesign of a High Throughput 128-bit AES (Rijndael Block Cipher)
Design of a High Throughput 128-bit AES (Rijndael Block Cipher Tanzilur Rahman, Shengyi Pan, Qi Zhang Abstract In this paper a hardware implementation of a high throughput 128- bits Advanced Encryption
More informationLightweight Mixcolumn Architecture for Advanced Encryption Standard
Volume 6 No., February 6 Lightweight Micolumn Architecture for Advanced Encryption Standard K.J. Jegadish Kumar Associate professor SSN college of engineering kalvakkam, Chennai-6 R. Balasubramanian Post
More informationExample Enemy agents are trying to invent a new type of cipher. They decide on the following encryption scheme: Plaintext converts to Ciphertext
Cryptography Codes Lecture 3: The Times Cipher, Factors, Zero Divisors, and Multiplicative Inverses Spring 2015 Morgan Schreffler Office: POT 902 http://www.ms.uky.edu/~mschreffler New Cipher Times Enemy
More informationSymmetric-key encryption scheme based on the strong generating sets of permutation groups
Symmetric-key encryption scheme based on the strong generating sets of permutation groups Ara Alexanyan Faculty of Informatics and Applied Mathematics Yerevan State University Yerevan, Armenia Hakob Aslanyan
More informationAutomated Analysis and Synthesis of Block-Cipher Modes of Operation
Automated Analysis and Synthesis of Block-Cipher Modes of Operation Alex J. Malozemoff 1 Jonathan Katz 1 Matthew D. Green 2 1 University of Maryland 2 Johns Hopkins University Presented at the Fall Protocol
More informationOVER THE REAL-TIME SELECTIVE ENCRYPTION OF AVS VIDEO CODING STANDARD
Author manuscript, published in "EUSIPCO'10: 18th European Signal Processing Conference, Aalborg : Denmark (2010)" OVER THE REAL-TIME SELECTIVE ENCRYPTION OF AVS VIDEO CODING STANDARD Z. Shahid, M. Chaumont
More informationSoftware Security. Encryption. Encryption. Encryption. Encryption. Encryption. Week 5 Part 1. Masking Data from Unwelcome eyes
Software Security Encryption Week 5 Part 1 Masking Data from Unwelcome eyes Encryption Encryption Encryption is the process of transforming data into another form Designed to make it readable only by those
More informationAvailable online at ScienceDirect. Procedia Computer Science 34 (2014 )
Available online at www.sciencedirect.com ScienceDirect Procedia Computer Science 34 (2014 ) 639 646 International Symposium on Emerging Inter-networks, Communication and Mobility (EICM 2014) A Tiny RSA
More informationSuccessful Implementation of the Hill and Magic Square Ciphers: A New Direction
Successful Implementation of the Hill and Magic Square Ciphers: A New Direction ISSN:319-7900 Tomba I. : Dept. of Mathematics, Manipur University, Imphal, Manipur (INDIA) Shibiraj N, : Research Scholar
More informationLOSSLESS CRYPTO-DATA HIDING IN MEDICAL IMAGES WITHOUT INCREASING THE ORIGINAL IMAGE SIZE THE METHOD
LOSSLESS CRYPTO-DATA HIDING IN MEDICAL IMAGES WITHOUT INCREASING THE ORIGINAL IMAGE SIZE J.M. Rodrigues, W. Puech and C. Fiorio Laboratoire d Informatique Robotique et Microlectronique de Montpellier LIRMM,
More informationA New Image Steganography Depending On Reference & LSB
A New Image Steganography Depending On & LSB Saher Manaseer 1*, Asmaa Aljawawdeh 2 and Dua Alsoudi 3 1 King Abdullah II School for Information Technology, Computer Science Department, The University of
More informationDalya Shihab Department of Computer Science, University of Al-Mustansiriyah Baghdad, Iraqi
International Journal of Computer Applications (975 8887) Volume 28 No., October 25 Lorenz and Rossler Chaotic System for Speech Signal Encryption Eman Hato Assistant Lecturer, Department of Computer Science,
More informationRunning head: SIMPLE SECRECY. Simple Secrecy: Analog Stream Cipher for Secure Voice Communication. John Campbell
Running head: SIMPLE SECRECY Simple Secrecy: Analog Stream Cipher for Secure Voice Communication John Campbell A Senior Thesis submitted in partial fulfillment of the requirements for graduation in the
More informationCESEL: Flexible Crypto Acceleration. Kevin Kiningham Dan Boneh, Mark Horowitz, Philip Levis
CESEL: Flexible Crypto Acceleration Kevin Kiningham Dan Boneh, Mark Horowitz, Philip Levis Cryptography Mathematical operations to secure data Fundamental for building secure systems Computationally intensive:
More informationIntroduction to Cryptography CS 355
Introduction to Cryptography CS 355 Lecture 25 Mental Poker And Semantic Security CS 355 Fall 2005 / Lecture 25 1 Lecture Outline Review of number theory The Mental Poker Protocol Semantic security Semantic
More informationStudy of Perfect Shuffle for Image Scrambling
International Journal of Scientific and Research Publications, Volume 4, Issue 2, February 2014 1 Study of Perfect Shuffle for Image Scrambling H.B.Kekre*, Tanuja Sarode**, Pallavi N.Halarnkar** *Computer
More informationError Detection and Correction
. Error Detection and Companies, 27 CHAPTER Error Detection and Networks must be able to transfer data from one device to another with acceptable accuracy. For most applications, a system must guarantee
More informationDedicated Cryptanalysis of Lightweight Block Ciphers
Dedicated Cryptanalysis of Lightweight Block Ciphers María Naya-Plasencia INRIA, France Šibenik 2014 Outline Introduction Impossible Differential Attacks Meet-in-the-middle and improvements Multiple Differential
More informationAlgorithmique appliquée Projet UNO
Algorithmique appliquée Projet UNO Paul Dorbec, Cyril Gavoille The aim of this project is to encode a program as efficient as possible to find the best sequence of cards that can be played by a single
More informationPurple. Used by Japanese government. Not used for tactical military info. Used to send infamous 14-part message
Purple Purple 1 Purple Used by Japanese government o Diplomatic communications o Named for color of binder cryptanalysts used o Other Japanese ciphers: Red, Coral, Jade, etc. Not used for tactical military
More informationDadmehr Rahbari, Yaghoub Farjami, Faranak Fotouhi Ghazvini
International Society of communication and Development among universities www.europeansp.org IT Cost Management Strategies, ISSN:1091-1820 Secure Audio Conversation by Steganography Based on Diffie Hellman
More informationSome Cryptanalysis of the Block Cipher BCMPQ
Some Cryptanalysis of the Block Cipher BCMPQ V. Dimitrova, M. Kostadinoski, Z. Trajcheska, M. Petkovska and D. Buhov Faculty of Computer Science and Engineering Ss. Cyril and Methodius University, Skopje,
More informationA Novel Approach to Solving N-Queens Problem
A Novel Approach to Solving N-ueens Problem Md. Golam KAOSAR Department of Computer Engineering King Fahd University of Petroleum and Minerals Dhahran, KSA and Mohammad SHORFUZZAMAN and Sayed AHMED Department
More informationProblem A: Code Breaking
South Pacific Contest, 1993 1 Problem A: Code Breaking Periodic permutation is a simple encryption technique which involves choosing a period, k, and a permutation of the first k numbers. To encrypt a
More informationComputer Science as a Discipline
Computer Science as a Discipline 1 Computer Science some people argue that computer science is not a science in the same sense that biology and chemistry are the interdisciplinary nature of computer science
More informationAn Efficient Quasigroup Block Cipher
Wireless Pers Commun DOI 10.1007/s11277-012-0959-x An Efficient Quasigroup Block Cipher Matthew Battey AbhishekParakh Springer Science+Business Media New York 2012 Abstract Low powered devices, such as
More informationGeneric Attacks on Feistel Schemes
Generic Attacks on Feistel Schemes Jacques Patarin 1, 1 CP8 Crypto Lab, SchlumbergerSema, 36-38 rue de la Princesse, BP 45, 78430 Louveciennes Cedex, France PRiSM, University of Versailles, 45 av. des
More informationReversible Data Hiding in Encrypted Images based on MSB. Prediction and Huffman Coding
Reversible Data Hiding in Encrypted Images based on MSB Prediction and Huffman Coding Youzhi Xiang 1, Zhaoxia Yin 1,*, Xinpeng Zhang 2 1 School of Computer Science and Technology, Anhui University 2 School
More informationExample Enemy agents are trying to invent a new type of cipher. They decide on the following encryption scheme: Plaintext converts to Ciphertext
Cryptography Codes Lecture 4: The Times Cipher, Factors, Zero Divisors, and Multiplicative Inverses Spring 2014 Morgan Schreffler Office: POT 902 http://www.ms.uky.edu/~mschreffler New Cipher Times Enemy
More informationA New Compression Method for Encrypted Images
Technology, Volume-2, Issue-2, March-April, 2014, pp. 15-19 IASTER 2014, www.iaster.com Online: 2347-5099, Print: 2348-0009 ABSTRACT A New Compression Method for Encrypted Images S. Manimurugan, Naveen
More informationA STENO HIDING USING CAMOUFLAGE BASED VISUAL CRYPTOGRAPHY SCHEME
International Journal of Power Control Signal and Computation (IJPCSC) Vol. 2 No. 1 ISSN : 0976-268X A STENO HIDING USING CAMOUFLAGE BASED VISUAL CRYPTOGRAPHY SCHEME 1 P. Arunagiri, 2 B.Rajeswary, 3 S.Arunmozhi
More information