Method and system for reading and propagating authenticated time throughout a worldwide enterprise system
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United States of America Patent
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Jun 17, 2003
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N/A
app pub date -
Dec 7, 1999
filing date -
Dec 7, 1999
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Abstract
A method and system for reading and propagating accurate time in a worldwide enterprise system through a hierarchical network of time servers, with a single time source at the top of the pyramid, and time source clients at the base. Single source time synchronization is assured by starting with an atomic clock receiver connected to a time source computer. Primary time servers next in the hierarchy access the source to obtain accurate time information. Clients access higher time servers to obtain time information. Time servers operate as multiple hierarchical layers between the clients and the time source, limiting the load on any single server and providing redundant paths to a valid time source. Time servers unable to verify their time through the primary, alternate, or failover servers invalidate themselves, thereby preserving system integrity.
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