Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Packet header designating cryptographically protected data
Reexamination Certificate
2011-01-18
2011-01-18
Moazzami, Nasser (Department: 2436)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Packet header designating cryptographically protected data
C713S154000, C713S182000, C726S002000, C380S033000, C380S037000
Reexamination Certificate
active
07873828
ABSTRACT:
A method and apparatus for encrypting data written to an Enterprise System Connection (ESCON) tape system and reading encrypted data from such a tape system and decrypting the encrypted data is described. One illustrative embodiment, in writing encrypted data to an ESCON tape system, receives from a computer over a first ESCON link a command to write a data block of specified size to the ESCON tape system; requests data constituting the data block from the computer in sub-blocks; compresses and encrypts each sub-block to produce a corresponding compressed and encrypted sub-block; and transmits to the ESCON tape system over a second ESCON link the compressed and encrypted sub-blocks using a series of chained-data write operations, the transmitted compressed and encrypted sub-blocks forming a compressed and encrypted data block on a tape of the ESCON tape system.
REFERENCES:
patent: 5838796 (1998-11-01), Mittenthal
patent: 6785815 (2004-08-01), Serret-Avila et al.
patent: 7079651 (2006-07-01), Den Boer
Fisher Gilford C.
Gruba Joseph F.
Rigg Christopher D.
Cooley LLP
Moazzami Nasser
Optica Technologies, Inc.
Reza Mohammad W
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