发明名称 |
Method of producing a proof of presence or of operation of an entity in an identified zone for a duration greater than a given threshold, and monitoring system |
摘要 |
A method for producing a proof of the presence and/or of the availability of an entity in a site over a period that is greater than or equal to a presence threshold, the method including: successively transmitting messages, the messages being generated from a secret such that the secret may be reconstituted by having the knowledge of a given number of messages that is greater than or equal to a threshold, each message being transmitted over a transmission period whose duration is chosen such that the product of the duration of the transmission period times the threshold is substantially equal to the presence threshold; comparing the secret and a secret candidate generated from messages received by the entity; the proof being produced only if the secret and the secret candidate are equal.
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申请公布号 |
US8477038(B2) |
申请公布日期 |
2013.07.02 |
申请号 |
US20080809487 |
申请日期 |
2008.12.18 |
申请人 |
ROUSSEAU FEDERIC;DELOISON JEAN-PHILIPPE;CASSIDIAN SAS |
发明人 |
ROUSSEAU FEDERIC;DELOISON JEAN-PHILIPPE |
分类号 |
G08B23/00 |
主分类号 |
G08B23/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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