Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Central trusted authority provides computer authentication
Reexamination Certificate
2005-02-15
2005-02-15
Sheikh, Ayaz (Department: 2131)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Central trusted authority provides computer authentication
C713S178000, C713S179000, C713S193000, C713S165000, C713S152000, C713S152000, C380S277000, C380S281000, C705S057000, C705S058000, C705S059000
Reexamination Certificate
active
06857071
ABSTRACT:
An editing apparatus generates a capsular work in which usage conditions for each of plural usages and usage secret information, obtained by encrypting a decryption key encrypted work data with ticket keys which differ depending on usage from each other, are encapsulated together with the encrypted work data. A ticket server apparatus, which manages the usage conditions and the ticket keys, issues a ticket containing a ticket key in the case of allowing a user to practice the usage requested by the user. A distribution center apparatus, which manages the capsular work, distributes the capsular work in accordance with the user's request. An audiovisual apparatus acquires the capsular work from the distribution center apparatus and requests the ticket necessary to make use of the capsular work from the ticket server apparatus. The audiovisual apparatus decrypts the encrypted work data contained in the capsular work and reproduces the work data only in the case where the audiovisual apparatus has acquired the ticket.
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Moorthy Aravind
NEC Corporation
Sheikh Ayaz
Young & Thompson
LandOfFree
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