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[DIR] Parent Directory - [PDF file] 013.pdf 57K Cryptanalysis of a Provably Secure Cryptographic Hash Function [PDF file] 015-samyde_french.pdf 63K Cryptanalyse par side channel [PDF file] 016-samyde_english.pdf 59K Side channel cryptanalysis [PDF file] 044.pdf 312K Cryptanalysis of Block Ciphers with Overdefined Systems of Equations [PDF file] 109.pdf 240K Cryptanalysis of SAFER++ [PDF file] 125.pdf 229K Algebraic Attacks on Combiners with Memory and Several Outputs [PDF file] 135.pdf 127K Collision Attack on Reduced Round Camellia [PDF file] 142.pdf 153K On the Applicability of Distinguishing Attacks Against Stream Ciphers [PDF file] 152.pdf 135K A note on Weak Keys of PES, IDEA and some Extended Variants [PDF file] 31-tkohno.pdf 224K Preliminary Cryptanalysis of Reduced-Round Serpent [PDF file] 35-ebiham.pdf 179K Cryptanalysis of Reduced Variants of Rijndael [PDF file] 36-tshimoyama.pdf 196K Correlation Attack to the Block Cipher RC5 and the Simplified Variants of RC6 [PDF file] 418pdf.pdf 125K Trojan Horse Attacking Strategy on Quantum Cryptography [PDF file] 752.pdf 662K Basic Cryptanalysis Techniques [PDF file] AttackTranspositionICEST2003.pdf 268K Attacks on the Transposition Ciphers Using Optimization Heuristics [PDF file] BauerCryptanalysis.pdf 96K Cryptanalysis [PDF file] CS0910.revised.pdf 197K Differential Fault Analysis of Secret Key Cryptosystems [PDF file] CS0928.pdf 177K Cryptanalysis of the ANSI X9.52 CDCM Mode [PDF file] Crypto94.pdf 230K Linear Cryptanalysis Using Multiple Approximations [PDF file] DFT2002_Paper.pdf 207K Fault-Based Side-Channel Cryptanalysis Tolerant Rijndael Symmetric Block Cipher Architecture [PDF file] Dobbertin_MD4.pdf 159K Cryptanalysis of MD4 [PDF file] Eurocrypt96.pdf 249K Non-Linear Approximations in Linear Cryptanalysis [PDF file] HG97chis.pdf 127K Cryptanalysis of the SEAL Encryption Algorithm [PDF file] Han99abs.pdf 62K Cryptanalyse et sécurité des algorithmes à clé secrète [PDF file] JournalHeysTavares.pdf 176K Substitution-Permutation Networks Resistant to Differential and Linear Cryptanalysis [PDF file] NitNat.pdf 335K Cracking the NitNat Cipher [PDF file] RSA-survey.pdf 303K Twenty Years of Attacks on RSA Cryptosystem [PDF file] ShortSecretExponents.pdf 119K Cryptanalysis of Short RSA Secret Exponents [PDF file] SubstGen.pdf 79K Solving Substitution Ciphers with Genetics Algorithm [PDF file] TalkSummerschool.pdf 161K Stream Cipher Cryptanalysis - Algebraic Attacks [PDF file] TriStrata.pdf 133K Security Weaknesses in a Randomized Stream Cipher [PDF file] TwokeytripleDES.pdf 58K Encryption and security: the Data Encryption Standard [PDF file] WuHongjun_2002_23840169.pdf 121K Cryptanalysis of Stream Cipher Alpha1 [PDF file] WuHongjun_2002_25130447.pdf 92K Related-Cipher Attacks [PDF file] Y_23_rc4_cryptana.pdf 200K Cryptanalysis of RC4-like Ciphers [PDF file] andreas3.pdf 2.3M How secure is a cipher? [PDF file] codebook_solution.pdf 325K How we Cracked the Code Book Ciphers [PDF file] correlation.pdf 140K Searching for the Optimum Correlation Attack [PDF file] cryptanalysis.pdf 147K A Self-Study Course in Block-Cipher Cryptanalysis [PDF file] cs753.pdf 227K New Types of Cryptanalytic Attacks Using Related Keys [PDF file] cs782.pdf 213K Differential Cryptanalysis of Lucifer [PDF file] cs813.pdf 188K On Matsui's Linear Cryptanalysis [PDF file] cs817.pdf 166K An Improvement of Davies' Attack on DES [PDF file] cs833.pdf 186K Cryptanalysis of Multiple Modes of Operation [PDF file] cs842.pdf 173K A Known Plaintext Attack on the PKZIP Stream Cipher [PDF file] cs885.pdf 261K Cryptanalysis of Triple Modes of Operation [PDF file] drm1.pdf 162K Attacking an obfuscated cipher by injecting faults [PDF file] extwp3-001-2.pdf 81K Cryptanalysis of LILI-128 [PDF file] fmirza-report.pdf 241K Block Ciphers And Cryptanalysis [PDF file] frogAES2pub.pdf 195K Cryptanalysis of FROG [PDF file] fse98.pdf 190K Differential Cryptanalysis of the ICE Encrypting Algorithm [PDF file] heurlang.pdf 34K Heuristic Language Analysis: Techniques and Applications [PDF file] icrijndael.pdf 204K Improved Cryptanalysis of Rijndael [PDF file] idea.pdf 191K The Block Cipher IDEA [PDF file] initial_securid_analysis.pdf 129K Initial Cryptanalysis of the RSA SecurID Algorithm [PDF file] keliherPhD.pdf 714K Linear Cryptanalysis of Substitution-Permutation Networks [PDF file] keysched-crypto96.pdf 220K Key-Schedule Cryptanalysis of IDEA, G-DES, GOST, SAFER, and Triple-DES [PDF file] keysched-icics97.pdf 218K Related-Key Cryptanalysis of 3-WAY, Biham-DES, CAST, DES-X, NewDES, RC2, and TEA [PDF file] loki97.pdf 87K Weaknesses in LOKI97 [TXT] md5-cryptanalysis.txt 5.8K Analysis and Design of Cryptographic Hash Functions [PDF file] mmthesis-side-channel.pdf 816K Techniques of Side Channel Cryptanalysis [PDF file] muxfsr.pdf 134K A Faster Attack on Certain Stream Ciphers [PDF file] natarara.pdf 151K Differential CryptAnalysis [PDF file] paper-design-vulnerabilities.pdf 108K Cryptographic Design Vulnerabilities [PDF file] provsec.pdf 145K Weak Keys [PDF file] pseudorandom_number.pdf 219K Cryptanalytic Attacks on Pseudorandom Number Generators [PDF file] rc5.pdf 202K Improved Differential Attacks on RC5 [PDF file] rc5diff.pdf 153K [PDF file] repetition_codes.pdf 68K Breaking Block Ciphers using Repetition Codes [TXT] rsa.txt 6.3K RSA: Attacking the cryptosystem [PDF file] sshtiming.pdf 317K Timing Analysis of Keystrokes and Timing Attacks on SSH [PDF file] ssl-timing.pdf 144K Remote Timing Attacks are Practical [PDF file] trunc_dif_saf.pdf 184K Truncated Differentials of SAFER
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TESTIMONY BY GEOFFREY S. GOODFELLOW Before the Subcommittee on Transportation, Aviation and Materials on the subject of Telecommunications Security and Privacy.

26 September 1983

Table of Contents 1. Introduction 2. The Nature of Computer Hackers and Hacking. 3. What Can and Should Be Done to Help Abate The Unsavory Hacking Problem? 4. Let Us Not Lull Ourselves into a False Sense of Security. 5. Recommendations 6. Biography (The Making of a Hacker)

1.Introduction

My name is Geoffrey S. Goodfellow. I am primarily employed by the Computer Science Laboratory at SRI International, Menlo Park, California. For the past 10 years at SRI, I have been involved in research efforts related with packet switched computer network communication systems, protocols and security technologies. I have also been involved in various operating and sub-system development projects. Currently, my responsibilities include a position as Principle Investigator of SRI's involvement in a Department of Defense program aimed at developing and proving secure computer systems, that operate at different security levels and communicate via networks. A detailed biography of my career from 7th grade school where I discovered computers (which eventually lead to my permanent abandonment of the formal educational system during high school) to how I got to where I am today with no degrees or any type of equivalency to my name is included at the end of my testimony. I am a coauthor of the Hacker's Dictionary -- A Guide to the World of Computer Wizards, a new book being published this fall. THE STATEMENTS INCLUDED HEREIN ARE MY OWN AND DO NOT NECESSARILY REPRESENT THOSE OF SRI INTERNATIONAL OR ANY CLIENTS OF SRI.

2. The Nature of Computer Hackers and Hacking.

The primary nature of a computer hacker can be defined as follows: - A person who enjoys learning or knowing the details of computer systems and how to stretch their capabilities, as opposed to most users of computers, who prefer to learn or know only the minimum amount necessary in order to get their job done. - One who programs computers enthusiastically, for the sheer fun of it, and gets a non professional amount of enjoyment out of using them. - A person capable of appreciating the irony and beauty (i.e.`hack value') of a program. - A person who is good at programming quickly or is an expert on aparticular program. (This definition and the proceeding ones are correlated, and people who fit them congregate). Unfortunately, though, hacking has an unsavory faction to it: - A malicious or inquisitive meddler (i.e. `poacher') who tries to discover information by poking around.For example, a "password hacker" is one who tries, possibly by deceptive or illegal means, to discover other people's computer passwords. - A "network hacker" is one who tries to learn about the computer network (possibly because he wants to interfere--one can tell the difference only by context, tone of voice and manner of approach).

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