US5812664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key distribution system
Assignee: Pitney Bowes Inc
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Filing: 1996-09-06
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Granted: 1998-09-22
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Expires: 2016-09-06
Abstract
Abstract This invention is a system for producing and distributing new decryption keys to verifiers. Verifier decryption key updates are printed in a secure manner on paper or postcards and mailed to the owners of the verifiers. The paper or postcards containing the verifier decryption key is scanned into the verifier and the verifier's key file is updated.
Inventors
- 👤 Elizabeth Bernobich
- 👤 Richard W. Heiden
- 👤 Robert W. Sisson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:41
CPC Classifications
G; G07; G07B; G07B17/00; G07B17/00733; H; H04; H04L; H04L9/00; H04L9/08; H04L9/0816; H04L9/0819; H04L9/0825; H04L9/0891; G07B17/00459; G07B17/00508; G07B2017/00572; G07B2017/0058; G07B2017/00588; G07B17/00661; G07B2017/00709; G07B2017/00741; G07B2017/00758; G07B2017/00846; G07B2017/0087; G07B2017/00879
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
125 words
A system for securing information for distribution and distributing information to verification equipment, said system comprising: means for printing, encrypted information on a medium, wherein the means for printing is a computer that generates a key distribution certificate by creating a master distribution public key pair and a session distribution key pair an encryptor/decryptor coupled to said computer, said encryptor/decryptor encrypts the session distribution public key with the master distribution private key and encrypts the distribution with the session distribution private key; means coupled to said encryptor/decryptor for producing symbols that represent the information encrypted by said encryptor/decryptor; mailing the secured information to the owners of verification equipment; and means for scanning the secured information into the verification equipment to update an information key file.
Claim 2
Independent Claim
125 words
A system for securing information for distribution and distributing information to verification equipment, said system comprising: means for printing, encrypted information on a medium, wherein the means for printing is a computer that generates a key distribution certificate by creating a master distribution public key pair and a session distribution key pair an encryptor/decryptor coupled to said computer, said encryptor/decryptor encrypts the session distribution public key with the master distribution private key and encrypts the distribution with the session distribution private key; means coupled to said encryptor/decryptor for producing symbols that represent the information encrypted by said encryptor/decryptor; mailing the secured information to the owners of verification equipment; and means for scanning the secured information into the verification equipment to update an information key file.
Claim 3
Dependent Claim
16 words
The system claimed in claim 1, wherein the secured information is printed on a post card.
Claim 4
Dependent Claim
14 words
The system claimed in claim 1, wherein the secured information is printed on paper.
Claim 5
Dependent Claim
17 words
The system claimed in claim 1, wherein the encrypted information is secured as a cryptographic digital signature.
Claim 6
Dependent Claim
16 words
The system claimed in claim 1, wherein the secured information is printed with an invisible ink.
Claim 7
Dependent Claim
16 words
The system claimed in claim 1, wherein the means for printing information prints a decryption key.
Claim 8
Dependent Claim
16 words
The system claimed in claim 1, wherein the means for printing information prints a certificate revocation.
Claim 9
Dependent Claim
16 words
The system claimed in claim 1, wherein the means for printing information prints a program update.
Claim 10
Dependent Claim
16 words
The system claimed in claim 1, wherein the means for printing information prints: client key updates.
Claim 11
Dependent Claim
19 words
The system claimed in claim 1, wherein the means for printing information prints: concatentated header information; and update information.
Claim 12
Dependent Claim
15 words
The system claimed in claim 1, wherein said symbol means comprises: a bar code generator.
Claim 13
Independent Claim
103 words
A method for producing decryption keys and distributing decryption keys to encryption equipment, said method comprising the steps of: printing decryption keys in a secure manner on a medium by generating a key distribution certificate by creating a master distribution public key pair and a session distribution key pair; encrypting the session distribution public key with the master distribution private key and encrypting the distribution with the session distribution private key: producing symbols that represent the information encrypted; mailing the decryption keys to the owners of encryption equipment; and scanning the decryption key into the encryption equipment to update a decryption key file.
Claim 14
Independent Claim
103 words
A method for producing decryption keys and distributing decryption keys to encryption equipment, said method comprising the steps of: printing decryption keys in a secure manner on a medium by generating a key distribution certificate by creating a master distribution public key pair and a session distribution key pair; encrypting the session distribution public key with the master distribution private key and encrypting the distribution with the session distribution private key: producing symbols that represent the information encrypted; mailing the decryption keys to the owners of encryption equipment; and scanning the decryption key into the encryption equipment to update a decryption key file.
Claim 15
Dependent Claim
15 words
The method of claim 12, wherein the decryption key is printed with an invisible ink.
Claim 16
Dependent Claim
18 words
The method of claim 12, wherein the decryption key is printed as a cryptographic digital signature 2D symbol.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-09-21 | 2002-03-23 | 2002-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-21 | 2006-03-23 | 2006-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-21 | 2010-03-23 | 2010-09-22 | $7700.00 | Window Closed / Lapsed |