| 5671285 |
Secure communication system |
| Sep-23-1997 |
Encryption/decryption capable terminal units, such as FAX point-of-sale units, on non-secure telecommunications, use public keys for accessing selected target terminals, but make their messages secure... |
| 5642419 |
Method for acquiring and revalidating an electronic credential |
| Jun-24-1997 |
A system for open electronic commerce having a customer trusted agent securely communicating with a first money module, and a merchant trusted agent securely communicating with a second money module. Both... |
| 5590197 |
Electronic payment system and method |
| Dec-31-1996 |
A cyber wallet in the form of stored and protected account information, which may be "carried" on a tamper resistant portable electronic storage medium such as a smartcard, or stored on the customer's... |
| 5590196 |
Secure payment method using facsimile |
| Dec-31-1996 |
Electronic funds transfer processes are being put into place to replace the paper based check clearing process. Although ubiquitous in the business environment, facsimile transmission technology has not... |
| 5530520 |
Method of allocating copyright revenues arising from reprographic device use |
| Jun-25-1996 |
A copyright revenue allocation system that identifies copyrighted works after they are copied. Each copying service within the system informs a copyright revenue allocation service of each page or sheet... |
| 5392353 |
Interactive satellite broadcast network |
| Feb-21-1995 |
Encrypted communications ensure privacy of communications point-to-point in a network of interactive video stations interconnected by a broadcast network. The encryption as a function of personal identity... |
| 5341429 |
Transformation of ephemeral material |
| Aug-23-1994 |
A bidirectional process allows remote transformation of ephemeral materials between an original form and a denatured form without changing the content of the material from its original form and without... |
| 5224162 |
Electronic cash system |
| Jun-29-1993 |
In an electronic cash system, K sets of blind signature information are derived from secret information containing identification information of a user, K/2 sets of them are opened and a bank attaches... |
| 4977595 |
Method and apparatus for implementing electronic cash |
| Dec-11-1990 |
In an electronic cash implementing method, a user makes a bank apply a blind signature to user information Vi produced, by a one-way function, from secret information Si containing identification information,... |
| 4789863 |
Pay per view entertainment system |
| Dec-6-1988 |
In a pay per view entertainment system, prerecorded entertainment such as musical works are distributed to subscribers over a cable network. The subscribers are able to listen to edited versions or previews... |
| 4747050 |
Transaction security system using time variant parameter |
| May-24-1988 |
An electronic funds transfer system (EFT) is described in which retail terminals located in stores are connected through a public switched telecommunication system to card issuing agencies data processing... |
| 4302810 |
Method and apparatus for secure message transmission for use in electronic funds transfer systems |
| Nov-24-1981 |
An electronic funds transfer system wherein it is required that a bank be reasonably guaranteed that the two parties to a retail transaction (i.e., a person and a retailer) agree on the transaction before... |
