Cryptography – Communication system using cryptography
Reexamination Certificate
2002-12-18
2008-10-07
Parthasarathy, Pramila (Department: 2136)
Cryptography
Communication system using cryptography
C713S172000, C713S193000, C713S194000, C726S020000
Reexamination Certificate
active
07433472
ABSTRACT:
A method of generating cryptographically protected digital data encoding content and arranged into messages each message being decodable by a decoder application on a client terminal having a service interface to assemble each message for the decoder application are described. The method can include retrieving a message encrypting at least part of the message; and providing the encrypted messages as output in a format enabling a server service interface to arrange the message into at least one packet including at least one header and a payload. In an example, the encrypted message is assembled by adding a resynchronisation marker, separating a message section from an adjacent message section and including explicit synchronisation information, to at least the further message sections.
REFERENCES:
patent: 6792111 (2004-09-01), Italia et al.
patent: 6948186 (2005-09-01), Brosey
patent: 7116894 (2006-10-01), Chatterton
patent: 1 143 722 (2001-10-01), None
Wee. S. J. et al.,Secure Scalable Streaming Enabling Transcoding Without Decryption, Proceedings 2001 International Conference on Image Processing, ICIP 2001, IEEE U.S. vol. 1 of 3 Conf. 8, Oct. 7, 2001, pp. 437-440.
PCT International Search Report for International Application No. PCT/EP 02/14828, mailed Oct. 10, 2003, 4 pages.
McLean Ivan Hugh
Wajs Andrew Augustine
Irdeto Access B.V.
Parthasarathy Pramila
Schwegman Lundberg & Woessner, P.A.
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