Electrical computers and digital processing systems: support – Data processing protection using cryptography
Reexamination Certificate
2005-12-20
2005-12-20
Sheikh, Ayaz (Department: 2131)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
C713S167000, C713S152000, C713S152000, C713S152000, C713S193000, C713S194000, C380S277000, C380S278000, C380S279000, C380S281000, C380S284000
Reexamination Certificate
active
06978376
ABSTRACT:
A method of controlling distribution of a segment of encrypted electronic information is presented. A key server receives a protected copy of a decryption key for the segment. The segment is retrieved at a user location. The protected copy of the decryption key is accessed. In response to the accessing, the segment is decrypted using the accessed copy of the decryption key at the user location. The accessed copy of the decryption key is destroyed at the user location in response to the decrypting. The decrypted segment is displayed in response to the decrypting. The decrypted segment is destroyed in response to the displaying.
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Giroux David
Sharko John
Authentica, Inc.
Chai Longbit
Sheikh Ayaz
Steptoe & Johnson LLP
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