The Twofish Encryption Algorithm: A 128-Bit Block CipherThe first and only guide to one of today's most important new cryptography algorithms The Twofish Encryption Algorithm A symmetric block cipher that accepts keys of any length, up to 256 bits, Twofish is among the new encryption algorithms being considered by the National Institute of Science and Technology (NIST) as a replacement for the DES algorithm. Highly secure and flexible, Twofish works extremely well with large microprocessors, 8-bit smart card microprocessors, and dedicated hardware. Now from the team who developed Twofish, this book provides you with your first detailed look at: * All aspects of Twofish's design and anatomy * Twofish performance and testing results * Step-by-step instructions on how to use it in your systems * Complete source code, in C, for implementing Twofish On the companion Web site you'll find: * A direct link to Counterpane Systems for updates on Twofish * A link to the National Institute of Science and Technology (NIST) for ongoing information about the competing technologies being considered for the Advanced Encryption Standard (AES) for the next millennium For updates on Twofish and the AES process, visit these sites: * www.wiley.com/compbooks/schneier * www.counterpane.com * www.nist.gov/aes Wiley Computer Publishing Timely.Practical.Reliable Visit our Web site at www.wiley.com/compbooks/ Visit the companion Web site at www.wiley.com/compbooks/schneier |
From inside the book
Results 1-3 of 6
Page 19
... compilers . This table shows our results for many different implementations . Each implementation is presented on a ... compiler ) . The keying options are explained below . The code size column contains the approximate total code size ...
... compilers . This table shows our results for many different implementations . Each implementation is presented on a ... compiler ) . The keying options are explained below . The code size column contains the approximate total code size ...
Page 24
... Compiler , and Processor Choice As with most algorithms , the choices of language and compiler can have a huge impact on performance . It is clear that the Borland C 5.0 compiler cho- sen as the standard AES reference is not the best ...
... Compiler , and Processor Choice As with most algorithms , the choices of language and compiler can have a huge impact on performance . It is clear that the Borland C 5.0 compiler cho- sen as the standard AES reference is not the best ...
Page 25
... compiler switches that seemed unrelated to performance optimization sometimes caused very large changes in timings . It should be noted that performance numbers for Pentium II processors are almost identical in all cases to those for a ...
... compiler switches that seemed unrelated to performance optimization sometimes caused very large changes in timings . It should be noted that performance numbers for Pentium II processors are almost identical in all cases to those for a ...
Common terms and phrases
active actually addition algorithm allow alternative analysis applications approximation attack bits block cipher bound choose chosen ciphertext clock compute consider constant construction CPUs cryptanalysis cryptographic cycles decryption define dependent derive difference sequence differential differential attack DWORD effect eight elements encryption example expect F function Feistel network fixed four give given guess hardware identical implementations improve input key bytes key material key schedule key-dependent S-boxes known larger least length linear MDS matrix mode multiply Note operations output Page Pages pattern Pentium performance permutations plaintext possible probability Proceedings properties random related-key attack right pair rotations round function round subkeys sequence simple single smart cards Software specific speed Springer-Verlag structure Table tion Twofish values variant weak whitening Workshop XOR difference XORed zero