Method and apparatus for protecting information and privacy

Details Method and apparatus for protecting information and privacy Method and apparatus for protecting information and privacy

2005-05-03

2005-05-03

Trammell, James P. (Department: 3621)

Data processing: financial, business practice, management, or co

Business processing using cryptography

Usage protection of distributed data files

C705S001100, C705S050000, C705S051000, C705S053000, C705S058000

Reexamination Certificate

active

06889209

ABSTRACT:
A mechanism for the purchase of tags for copies of software ensures that identity of the purchaser of a tag table identifier value included in a purchased tag is not revealed. A mechanism of Call-Ups from the user device to a guardian center ensures that each tag table identifier value appears in only one user device and that the data included in a tag table and other data stored in the user device for the purpose of protecting vendor's and owner's rights in software, cannot be modified.

REFERENCES:
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patent: 5719941 (1998-02-01), Swift et al.
patent: 5892900 (1999-04-01), Ginter et al.
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patent: 6134327 (2000-10-01), Van Oorschot
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patent: 6240184 (2001-05-01), Huynh et al.
patent: 6341352 (2002-01-01), Child et al.
patent: 411136618 (1999-05-01), None
Digimarc:Digimac watermarking technology receives U.S. patent; Jun. 11, 1997; Business Wire.

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