Method and system for limiting the possibility of...

Details Method and system for limiting the possibility of... Method and system for limiting the possibility of...

2006-08-22

2006-08-22

Peeso, Thomas R. (Department: 2132)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S189000, C713S193000

Reexamination Certificate

active

07096361

ABSTRACT:
The subject of the invention concerns a process and a system to limit the possibility to transform data, the transformation of TX-type data into TY-type data being carried out using an A-type transformation function, while the transformation of TY-type data into TX-type data is carried out using a B-type transformation function, inverse of the A-type transformation function, the data being in particular designed to constitute for instance pre-payment tokens.According to the invention, the system includes at least one A-type data processing system (STDA), at least one B-type data processing system (STDB), at least one link, at least once, between the system (STDA) and the system (STDB), at least one A-type processing and memorizing unit (UTMA) including at least the A-type transformation function, at least one B-type processing and memorizing unit (UTMB) including the B-type transformation function and not including the A-type transformation function.

REFERENCES:
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patent: 0 451 057 (1991-10-01), None
patent: 0 507 669 (1992-10-01), None
patent: 0 865 010 (1998-09-01), None
patent: WO 97 30409 (1997-08-01), None
patent: WO 98 22915 (1998-05-01), None
patent: WO 98 43211 (1998-10-01), None

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