US Patent No: 7,016,499
Number of patents in Portfolio can not be more than 2000
Secure ephemeral decryptability
Stats
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Mar 21, 2006
Issued date -
Jun 13, 2001
filing date -
09/880,470
serial no -
In Force
status
Importance
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Abstract
A method and apparatus for securely communicating ephemeral information from a first node to a second node. In a first embodiment, the first node encodes and transmits an ephemeral message encrypted at least in part with an ephemeral key, from the first node to the second node. Only the second node has available to it the information that is needed to achieve decryption by an ephemeral key server of a decryption key that is needed to decrypt certain encrypted payload information contained within the message communicated from the first node to the second node. In a second embodiment the first node transmits to the second node an ephemeral message that is encrypted at least in part with an ephemeral key. The ephemeral message includes enough information to permit the second node to communicate at least a portion of the message to an ephemeral key server and for the ephemeral key server to verify that the second node is an authorized decryption agent for the message. After verifying that the second node is an authorized decryption agent for the message, the ephemeral key server returns to the second node an encrypted decryption key that is needed to decrypt the encrypted message. The ephemeral message may comprise an encrypted decryption key that may be used after decryption of the decryption key to decrypt other encrypted information communicated to the second node.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 6,044,462 Method and apparatus for managing key revocation | 106 | 1997 | |
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| 2002/0136,410 Method and apparatus for extinguishing ephemeral keys | 23 | 2001 | |
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| 6,240,187 Key replacement in a public key cryptosystem | 95 | 1998 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Sep 21, 2013 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 21, 2017 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |