Tamper Detection in Audit Logs

Audit logs are considered good practice for business systems, and are required by federal regulations for secure systems, drug approval data, medical information disclosure, financial records, and electronic voting. Given the central role of audit logs, it is critical that they are correct and inalterable. It is not sufficient to say, “our data is correct, because we store all interactions in a separate audit log.” The integrity of the audit log itself must also be guaranteed. This paper proposes mechanisms within a database management system (DBMS), based on cryptographically strong one-way hash functions, that prevent an intruder, including an auditor or an employee or even an unknown bug within the DBMS itself, from silently corrupting the audit log. We propose that the DBMS store additional information in the database to enable a separate audit log validator to examine the database along with this extra information and state conclusively whether the audit log has been comprom...

• Type: Conference
• Year: 2004
• Where: VLDB
• Authors: Richard T. Snodgrass, Shilong (Stanley) Yao, Christian S. Collberg
• Keywords: Audit Log, Audit Log Validator, Database, Separate Audit Log, VLDB 2004