Explore the vulnerabilities in Oracle's data redaction service, introduced in Oracle 12c, through this Black Hat conference talk. Learn how the service, designed to protect sensitive data like PII, can be bypassed by attackers, potentially leading to privilege escalation. Delve into the history of Oracle security issues, examine the implementation flaws, and discover multiple attack vectors that compromise the redaction feature. Understand the implications for PCI compliance and data encryption. Compare Oracle's approach to Microsoft's, and gain insights into Oracle's internal processes and documentation practices. Discover practical strategies to protect against these vulnerabilities and critically evaluate the effectiveness of Oracle's data redaction service in real-world scenarios.