Combined hardware and software based encryption of databases

  • US 6,963,980 B1
  • Filed: 11/16/2000
  • Issued: 11/08/2005
  • Est. Priority Date: 11/16/2000
  • Status: Active Grant
First Claim
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1. A relational database system for encryption of individual data elements from a relational database, said relational database system comprisinga plurality of encryption devices being of at least two different types, the types being tamper-proof hardware and software implemented,said encryption being provided by different encryption processes utilizing at least one process key in each of the categories master keys, key encryption keys, and data encryption keys, said process keys of different categories being held in said encryption devices;

  • wherein said encryption processes are of at least two different security levels, where a process of a higher security level has greater access to said tamper-proof hardware device than a process of a lower security level;

    wherein each data element which is to be protected is assigned an attribute indicating an encryption level, said encryption level corresponding to an encryption process of a certain security level.

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