Optionally moderated transaction systems

Details Optionally moderated transaction systems Optionally moderated transaction systems

1990-11-05

1992-07-14

Buczinski, Stephen C.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 25, 380 49, H04K 100, H04K 900, H04L 902

Patent

active

051310392

ABSTRACT:
A tamper-resistant part is disclosed that can conduct transactions with an external system through a moderating user-controlled computer or that can on other occasions be brought into direct connection with the external system. In the moderated configuration, the moderating computer is able to ensure that certain transactions with the external system are unlinkable to each other. In the unmoderated configuration, the tamper-resistant part can also ensure the unlinkability of certain transactions. Also testing configurations are disclosed that allow improper functioning of the tamper-resistant part, such as that which could link transactions, to be detected by user-controlled equipment. Another testing configuration can detect improper functioning of an external system that could, for instance, obtain linking information from a tamper-resistant part.

REFERENCES:
patent: 4123747 (1978-10-01), Lancto et al.
patent: 4797928 (1989-01-01), Dykes
patent: 4926480 (1990-05-01), Chaum

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