Authentification of data in a digital transmission system
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Accused Products
Abstract
A method of authentification of data sent in a digital transmission characterised by the organisation and authentification of the data prior to transmission into a hierarchy of at least one root directory unit (75), subdirectory unit (76) and file unit (77), data in a file (77) being acted upon by an authentification algorithm and an associated file authentification value (82) stored in the referring subdirectory unit (77), this file authentification value (82) being in turn acted upon by an authentification algorithm and an associated subdirectory authentification value (79) stored in the referring root directory. Other aspects of the invention relate to the authentification of a second root directory (78) by generation of a second authentification value (83) and the authentification of data before encapsulation in tables or sections of a transport stream.
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Citations
28 Claims
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1-18. -18. (Canceled)
- 19. A method of authentification of data sent in a digital transmission system, characterized in that data is organized in a series of data files, authentification being carried out between files independently of and prior to the stage or stages of formatting and encapsulation of data used by the digital transmission system to prepare data for transmission in a packet transport stream.
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21-23. -23. (Canceled)
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27. (Canceled)
Specification