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John Langford
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Publications
year
title
booktitle
pages
1
2003
CAPTCHA: Using Hard AI Problems for Security
eurocrypt
online
2
2002
Provably Secure Steganography
crypto
online
3
2002
Provably Secure Steganography
eprint
online
Coauthors of John Langford
Luis von Ahn
Manuel Blum
Nicholas J. Hopper