Alex Biryukov
Encyclopedia
Alex Biryukov is a cryptographer, currently an assistant professor at the University of Luxembourg
. His notable work includes the design of the stream cipher
LEX
, as well as the cryptanalysis
of numerous cryptographic primitive
s. In 1998, he developed impossible differential cryptanalysis
together with Eli Biham
and Adi Shamir
. In 1999, he developed the slide attack
together with David Wagner. In 2009 he developed, together with Dmitry Khovratovich, the first cryptanalytic attack on full-round AES
-192 and AES-256 that is faster than a brute-force attack.
University of Luxembourg
thumb|Campus LimpertsbergThe University of Luxembourg is the only university in Luxembourg, founded on 13 August 2003. Prior to that, there were several higher educational institutions such as the cour universitaire or the IST that offered one or two years of academic studies...
. His notable work includes the design of the stream cipher
Stream cipher
In cryptography, a stream cipher is a symmetric key cipher where plaintext digits are combined with a pseudorandom cipher digit stream . In a stream cipher the plaintext digits are encrypted one at a time, and the transformation of successive digits varies during the encryption...
LEX
LEX (cipher)
LEX is a stream cipher based on the round transformation of AES. LEX provides the same key agility and short message block performance as AES while handling longer messages faster than AES...
, as well as the cryptanalysis
Cryptanalysis
Cryptanalysis is the study of methods for obtaining the meaning of encrypted information, without access to the secret information that is normally required to do so. Typically, this involves knowing how the system works and finding a secret key...
of numerous cryptographic primitive
Cryptographic primitive
Cryptographic primitives are well-established, low-level cryptographic algorithms that are frequently used to build computer security systems. These routines include, but are not limited to, one-way hash functions and encryption functions.- Rationale :...
s. In 1998, he developed impossible differential cryptanalysis
Impossible differential cryptanalysis
In cryptography, impossible differential cryptanalysis is a form of differential cryptanalysis for block ciphers. While ordinary differential cryptanalysis tracks differences that propagate through the cipher with greater than expected probability, impossible differential cryptanalysis exploits...
together with Eli Biham
Eli Biham
Eli Biham is an Israeli cryptographer and cryptanalyst, currently a professor at the Technion Israeli Institute of Technology Computer Science department. Starting from October 2008, Biham is the dean of the Technion Computer Science department, after serving for two years as chief of CS graduate...
and Adi Shamir
Adi Shamir
Adi Shamir is an Israeli cryptographer. He is a co-inventor of the RSA algorithm , a co-inventor of the Feige–Fiat–Shamir identification scheme , one of the inventors of differential cryptanalysis and has made numerous contributions to the fields of cryptography and computer...
. In 1999, he developed the slide attack
Slide attack
The slide attack is a form of cryptanalysis designed to deal with the prevailing idea that even weak ciphers can become very strong by increasing the number of rounds, which can ward off a differential attack. The slide attack works in such a way as to make the number of rounds in a cipher irrelevant...
together with David Wagner. In 2009 he developed, together with Dmitry Khovratovich, the first cryptanalytic attack on full-round AES
AES
AES may refer to:Standards, systems, and methods* Application Environment Services, a component of Digital Research's GEM windowing system* The Advanced Encryption Standard...
-192 and AES-256 that is faster than a brute-force attack.