Data encrypting and decrypting apparatus and method
US6490353B1 · kind B1 · utility
186Cited by
8References
23Claims
0Family size
Inventor
Key dates
| Filing date | Nov 23, 1998 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Nov 23, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/56
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A crytography method of encrypting data is disclosed. The method provides for creating or selecting a master key. Thereafter, the data to be encrypted is segmented into data blocks of equal or variable lengths. For each data block a sub-key of an arbitrary starting position is selected from a pre-defined set of arbitrary positions and of matched or unmatched length from the master key, where the master key length is selected from a pre-defined set of arbitrary lengths. Having acquired the sub-key for each data block, each data block is encrypted using its sub-key and an encryption algorithm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.