发明授权
- 专利标题： Compressing block-cipher encrypted data
- 专利标题（中）： 压缩块加密的加密数据
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申请号： US12610754申请日： 2009-11-02
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公开(公告)号： US08934630B2公开(公告)日： 2015-01-13
- 发明人: Camit Hazay , Ashish Jagmohan , Demijan Klinc , Hugo M. Krawczyk , Tal Rabin
- 申请人： Camit Hazay , Ashish Jagmohan , Demijan Klinc , Hugo M. Krawczyk , Tal Rabin
- 申请人地址： US NY Armonk
- 专利权人： International Business Machines Corporation
- 当前专利权人： International Business Machines Corporation
- 当前专利权人地址： US NY Armonk
- 代理机构： Scully, Scott, Murphy & Presser, P.C.
- 代理商 Jennifer Davis, Esq.
- 主分类号： H04K1/00
- IPC分类号： H04K1/00 ; H04N19/12 ; H04L29/06 ; H04L9/06
摘要：
A method, system and computer program product are disclosed for compressing encrypted data, wherein the data is encrypted by using a block encryption algorithm in a chained mode of operation, and the encrypted data is comprised of a set of N encrypted blocks, C1 . . . CN. In one embodiment, the method comprises leaving block CN uncompressed, and compressing all of the blocks C1 . . . CN in a defined sequence using a Slepian-Wolf code. In an embodiment, the data is encrypted using an encryption key K, and the compressing includes compressing all of the blocks C1 . . . CN without using the encryption key. In one embodiment, the compressing includes outputting the blocks C1 . . . CN as a set of compressed blocks CmprC1 . . . CmprCN-1, and the method further comprises decrypting CN to generate a reconstructed block {tilde over (X)}n, and decrypting and decompressing the set of compressed blocks using {tilde over (X)}n.
公开/授权文献
- US20110103580A1 COMPRESSING ENCRYPTED DATA WITHOUT THE ENCRYPTION KEY 公开/授权日：2011-05-05
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