Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Reexamination Certificate
2003-04-04
2009-02-03
Zand, Kambiz (Department: 2439)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
C726S002000, C726S004000, C726S026000, C726S027000, C726S030000, C713S161000, C713S164000, C713S167000, C713S171000, C713S182000, C380S028000, C380S202000, C380S259000, C380S278000
Reexamination Certificate
active
07487365
ABSTRACT:
In accordance with certain aspects, data is received from a calling program. Ciphertext that includes the data is generated, using a symmetric cipher, in a manner that allows only one or more target programs to be able to obtain the data from the ciphertext. In accordance with other aspects, a bit string is received from a calling program. An identifier of the calling program is checked to determine whether the calling program is allowed to access data encrypted in ciphertext of the bit string. The integrity of the data is also verified, and the data is decrypted using a symmetric key. The data is returned to the calling program only if the calling program is allowed to access the data and if the integrity of the data is successfully verified.
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England Paul
Peinado Marcus
Jackson Jenise
Microsoft Corporation
Zand Kambiz
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