Password recovery system and method

Details Password recovery system and method Password recovery system and method

2006-06-11

2010-10-05

Barron, Jr., Gilberto (Department: 2432)

Cryptography

Cryptanalysis

C380S286000, C713S184000, C726S006000

Reexamination Certificate

active

07809130

ABSTRACT:
A system, method and computer program product for recovering a password including, for each possible password to be tested, generating a periodicity unit based on a number of symbols in the password and a size of a chunk used by a one-way function to encrypt the password. The periodicity unit is substantially shorter than an input string, that includes replicated actual password used to encrypt the password. Based on the periodicity unit, using the one-way function, generating a control value for the periodicity unit. The control value is tested for a match with a control value generated from the actual password. An indication of a match is provided to a user.

REFERENCES:
patent: 6473757 (2002-10-01), Garofalakis et al.
patent: 7149801 (2006-12-01), Burrows et al.
patent: 2004/0073815 (2004-04-01), Sanai et al.
patent: 2007/0014416 (2007-01-01), Rivera et al.
M. Abadi, M. Burrows, M. Manasse, and T. Wobber, “Moderately Hard, Memory-Bound Functions”, ACM Transactions on Internet Technology, vol. 5, No. 2, May 2005, pp. 299-327.
RFC 2898, “PKCS #5: Password-Based Cryptography Specification Version 2.0,” Sep. 2000.
Antoon Bosselaers et al., SHA: A Design for Parallel Architectures?, http://homes.esat.kuleuven.be/˜cosicart/pdf/AB-9700.pdf (1997).
Antoon Bosselaers, Even Faster Hashing on the Pentium, http://homes.esat.kuleuven.be/˜cosicart/pdf/AB-9701.pdf (1997).

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