Data authentication method and data authentication system

Details Data authentication method and data authentication system Data authentication method and data authentication system

2011-07-12

2011-07-12

Chai, Longbit (Department: 2431)

Electrical computers and digital processing systems: support

Computer program modification detection by cryptography

C713S188000, C713S189000, C713S190000, C713S191000, C713S192000, C726S026000, C726S027000, C726S028000, C726S029000, C726S030000

Reexamination Certificate

active

07979719

ABSTRACT:
A storage means which can be accessed by an authentication apparatus stores content data, a first digest table including primary digest values corresponding to a plurality of data portions constituting the content data, a second digest table including secondary digest values corresponding to a plurality of data portions of the first digest table, and a digital signature generated from the second digest table. In a first reading step, the second digest table and the digital signature are read out from the storage means into a memory of the authentication apparatus. In a first authentication step, the authenticity of the content data is verified using the digital signature read out into the memory and the second digest table read out into the memory.

REFERENCES:
patent: 2003/0084298 (2003-05-01), Messerges et al.
patent: 2006-74421 (2006-03-01), None

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