- Arjen Lenstra
Arjen Klaas Lenstra (born 1956, Groningen) is a Dutch mathematician. He studied mathematics at the
University of Amsterdam .He is currently a professor at theEPFL (Lausanne ), in the Laboratory for Cryptologic Algorithms, andpreviously worked forCitibank andBell Labs .Lenstra is active in
cryptography , especially in areas such asinteger factorization and theXTR cryptosystem .He has been involved in the successful factoring of severalRSA numbers .Lenstra's brother
Hendrik Lenstra is a professor in mathematics atLeiden University and his brother Jan Karel Lenstra is the director of CWI (Dutch: Centrum voor Wiskunde en Informatica or CWI).On
1 March 2005 , Arjen Lenstra,Xiaoyun Wang , and Benne de Weger ofEindhoven University of Technology demonstrated [ [http://eprint.iacr.org/2005/067 Cryptology ePrint Archive ] ] construction of twoX.509 certificates with different public keys and the sameMD5 hash, a demonstrably practicalhash collision . The construction included private keys for both public keys.Lenstra is the recipient of the "Excellence in the Field of Mathematics" RSA® Conference 2008 Award [ [http://www.rsaconference.com/Conference_Info/RSA_Conference_Awards.aspx RSA Conference Awards] ] .
References
External links
* [http://people.epfl.ch/arjen.lenstra Web page on Arjen Lenstra at EPFL]
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