Database management apparatus and encrypting/decrypting system
US7093137B1 · kind B1 · utility
79Cited by
8References
8Claims
0Family size
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Key dates
| Filing date | Sep 26, 2000 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Dec 6, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99936
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a database, a frequently retrieved column is encrypted using a common key, and other columns are encrypted using a specific row key. Thus, a retrieving process can be performed at a high speed, and the security can be improved. Then, the row and column of the database are encrypted by assuming the plaintext to be encrypted as a bit string, and performing a binary operation with a random bit string. A random bit string is obtained by sequentially generating multidimensional vectors using a nonlinear function by defining a predetermined bit length as 1 word and a plurality of words as components of the multidimensional vector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.