Invention Grant
US09473829B2 Methods and devices for selective format-preserving data encryption
有权
用于选择性格式保存数据加密的方法和设备
- Patent Title: Methods and devices for selective format-preserving data encryption
- Patent Title (中): 用于选择性格式保存数据加密的方法和设备
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Application No.: US13611837Application Date: 2012-09-12
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Publication No.: US09473829B2Publication Date: 2016-10-18
- Inventor: Frédéric Lefebvre , Séverine Baudry , Antoine Robert , Philippe Roudot
- Applicant: Frédéric Lefebvre , Séverine Baudry , Antoine Robert , Philippe Roudot
- Applicant Address: FR Issy-les-Moulineaux
- Assignee: Thomson Licensing
- Current Assignee: Thomson Licensing
- Current Assignee Address: FR Issy-les-Moulineaux
- Agency: Myers Wolin LLC
- Priority: EP11306136 20110912
- Main IPC: H04N7/167
- IPC: H04N7/167 ; H04N21/845 ; H04N21/2389 ; H04N21/2362 ; H04N21/434 ; H04N21/4385
Abstract:
Selective data encryption of a file, in particular an H.264/MPEG-4 AVC data stream. If a first unit in the data stream is to be encrypted, it is encrypted and the encryption is put into a further unit, preferably in the data stream. A substitution unit is generated and put in the place of the first unit; if necessary, at least one header value is taken from the first unit for use in the substitution unit. A decryptor receives the encrypted data stream, extracts and decrypts the further unit and replaces the substitution unit with a regenerated first unit.
Public/Granted literature
- US20130064368A1 METHODS AND DEVICES FOR SELECTIVE FORMAT-PRESERVING DATA ENCRYPTION Public/Granted day:2013-03-14
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