Patent US6490680B1 successfully refreshed from Google Patents.
US6490680B1
Expired / Lapsed
US
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Access control and authorization system
Assignee: Tecsec Inc
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Filing: 1998-12-04
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Granted: 2002-12-03
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Expires: 2018-12-04
Abstract
Abstract A process of encrypting an object includes applying a hash algorithm to the object, generating a random number, combining a first plurality of splits including the random number to form a working split, encrypting the object using the working split, combining a second plurality of splits not including the random number to form a value, encrypting the random number using the value, encrypting the hashed object according to a signature algorithm using a user private key, encrypting the hashed object according to a selected algorithm using the working split as a key, forming a header including information that can be used to decrypt the object, encrypting the header, and adding the encrypted header to the encrypted object. The pluralities of splits include a fixed split, a variable split, and a label split corresponding to a selected label. The header includes the encrypted random number, a label, and a digital signature.
Inventors
- 👤 Edward M. Scheidt
- 👤 Ersin L. Domangue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:30
CPC Classifications
H; H04; H04L; H04L63/00; H04L63/04; H04L63/0428; H04L63/0442; H04L63/08; H04L63/0853; H04L63/0861; H04L63/10; H04L63/102; H04L63/12; H04L9/00; H04L9/14; H04L9/32; H04L9/3226; H04L9/3231; H04L9/3234; H04L9/3247; H04L2209/00; H04L2209/80; H04L2209/805
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
178 words
A process of securing an object, comprising: applying a cryptographic hash algorithm to the object to provide a hash value; storing the hash value on a token; generating a random key component; combining a first plurality of key components to form a first key; encrypting the object using the first key; combining a second plurality of key components to form a second key; encrypting the random key component using the second key to form an encrypted key component; encrypting the hash value according to a digital signature algorithm using a user private key, to provide a digital signature; encrypting the hash value according to a user algorithm using the first key; forming a header including information that can be used to decrypt the encrypted object, wherein the information includes the user algorithm, the encrypted key component, and decrypt read credentials; encrypting the header; and adding the encrypted header to the encrypted object; wherein the first plurality of key components includes the random key component, and the second plurality of key components does not include the random key component.
Claim 2
Dependent Claim
178 words
A process of securing an object, comprising: applying a cryptographic hash algorithm to the object to provide a hash value; storing the hash value on a token; generating a random key component; combining a first plurality of key components to form a first key; encrypting the object using the first key; combining a second plurality of key components to form a second key; encrypting the random key component using the second key to form an encrypted key component; encrypting the hash value according to a digital signature algorithm using a user private key, to provide a digital signature; encrypting the hash value according to a user algorithm using the first key; forming a header including information that can be used to decrypt the encrypted object, wherein the information includes the user algorithm, the encrypted key component, and decrypt read credentials; encrypting the header; and adding the encrypted header to the encrypted object; wherein the first plurality of key components includes the random key component, and the second plurality of key components does not include the random key component.
Claim 3
Dependent Claim
19 words
The process of claim 1 , wherein the user algorithm is selected from among a plurality of user algorithms.
Claim 4
Dependent Claim
19 words
The process of claim 1 , wherein the first plurality of key components includes a fixed organization key component.
Claim 5
Dependent Claim
19 words
The process of claim 1 , wherein the first plurality of key components includes a variable maintenance key component.
Claim 6
Dependent Claim
41 words
The process of claim 1 , further comprising: selecting at least one permission instance from a plurality of permission instances; wherein the first plurality of key components includes a label key component corresponding to the at least one selected permission instance.
Claim 7
Dependent Claim
16 words
The process of claim 1 , wherein the random key component is generated on the token.
Claim 8
Dependent Claim
14 words
The process of claim 1 , wherein the header is encrypted on the token.
Claim 9
Dependent Claim
29 words
The process of claim 5 , wherein the second plurality of key components includes a fixed organization key component, a variable maintenance key component, and the label key component.
Claim 10
Dependent Claim
26 words
The process of claim 5 , wherein the header further includes the encrypted key component, the at least one selected permission instance, and the digital signature.
Claim 11
Dependent Claim
106 words
A process of decrypting an object secured according to the process of claim 1 , comprising: decrypting the header to recover the information that can be used to decrypt the encrypted object, wherein the information includes the encrypted key component, the user algorithm, and the decrypt read credentials; checking at least some of the information that can be used to decrypt the encrypted object against the decrypt read credentials; using the second plurality of key components to recover the random key component; using the first plurality of key components to recover the first key; and decrypting the encrypted object using the algorithm and the first key.
References Cited (Backward Citations)
US5499297A
Cited
US5694472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-12-02 | 2006-06-03 | 2006-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-12-02 | 2010-06-03 | 2010-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-12-02 | 2014-06-03 | 2014-12-03 | $7700.00 | Window Closed / Lapsed |