Data type preserving encryption

Details Data type preserving encryption Data type preserving encryption

2000-11-27

2008-08-26

Barron, Jr., Gilberto (Department: 2132)

Cryptography

Particular algorithmic function encoding

C380S029000, C380S037000, C380S042000, C713S193000

Reexamination Certificate

active

07418098

ABSTRACT:
A method and a system for encryption of a data element in a relational database, wherein each data element includes a string of at least one character. The method includes the steps of: reading the type of a data element which is to be encrypted; interpreting the data type to form a restricting character set for each character of the data element; and encrypting each character of the data element into an encrypted character selected from the restricting character set.

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