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| A long-term authentication warrantee
system for electronic documents. |
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| Master
Copy Security Function |
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Prevents alteration of saved
data (master copy.) |
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Guarantees that the reference
data is consistent with the master copy. |
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| Authentication
function |
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Issuance of electronic authentication
( certifies data content, existence, time, and access
facts.) |
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Issuance of time stamps (
certifies content, authenticity, and current time
of data.) |
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