Optionally moderated transaction systems
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United States of America Patent
Stats
-
Jan 4, 1994
Issued Date -
N/A
app pub date -
Jul 13, 1992
filing date -
Jan 29, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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