Database management apparatus and encrypting/decrypting system
September 26, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesKey management system for on-line communication Public key encryption and decryption circuitry and method Personal identification encryptor and method System and method for access control for portable data storage media Crypt key system Data processing apparatus with software protecting functions Method and apparatus for secure storage of data Patent #: 5963642 InventorsAssigneeApplicationNo. 09670424 filed on 09/26/2000US Classes:713/193, By stored data protection380/277, KEY MANAGEMENT707/6, Pattern matching access705/71, Including key management380/30, Public key705/72, Verifying PIN705/51, Usage protection of distributed data files705/52, Usage or charge determination380/44Having particular key generatorExaminersPrimary: Sheikh, Ayaz R.Assistant: Parthasarathy, Pramila Attorney, Agent or FirmInternational ClassG06F 11/30AbstractIn 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.Other References
Field of SearchBy stored data protection | |
