Method and apparatus for enabling trial period use of software products: method and apparatus for passing encrypted files between data processing systems
US5563946A · kind A · utility
514Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1994 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | Apr 25, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2137
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is provided for transferring encrypted files from a source computer to one or more target computers. An export program is provided in the source computer and an import program is provided in the target computer. The export program decrypts the encrypted file and tags the export operation with an export counter value. The clear text file is then encrypted with an encryption operation utilizing a key which is unique to a transfer memory media, such as diskette serial number. The memory media is carried to a target computer which utilizes the import file to decrypt the encrypted file.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.