Application specific Anonymization and Privacy – Preserving Access Control Mechanism for Relational data

Access Control Mechanisms (ACM) are used to ensure that only authorized information is available to users. However, sensitive information can still be misused by authorized users to compromise the privacy of consumers. The concept of privacy-preservation for sensitive data can require the enforcement of privacy policies or the protection against identity disclosure by satisfying some privacy requirements. Anonymity techniques can be used with an access control mechanism to ensure both security and privacy of the sensitive information. The privacy is achieved at the cost of accuracy and imprecision is introduced in the authorized information under an access control policy. The proposed system is an integrated framework of achieving both privacy and security is proposed though the integration of Access Control Mechanism with Privacy Preservation Technique to prevent the authorized user from misusing the sensitive information with some accuracy loss of data due to the application of privacy preserving technique. The access control policies define selection predicates available to roles while the privacy requirement is to satisfy the k-anonymity or l-diversity. An additional constraint that needs to be satisfied by the PPM is the imprecision bound for each selection predicate. The proposed system applies the application specific anonymization.