A database record encryption scheme using the RSA public key cryptosystem and its master keys

Two new database encryption systems are presented. Both systems are based on the concept of the RSA (Rivest, Shamir, Adleman) master key. The first proposed system is a field-oriented encryption system with user master keys that correspond to the access rights of multiple fields. The second proposed system is a record-oriented encryption system with a user master key. Using the idea of master keys, we present a method that establishes a correspondence between the subsets of a given set and a set of integers.