Encrypted session tokens vary in length, indicating inconsistent encryption strength.

CEH v13 explains that cryptographic consistency is essential for secure session management. Variable token lengths can leak information about encryption methods, key sizes, or user privilege levels, making sessions vulnerable to cryptanalysis or targeted attacks.

The most effective mitigation is implementing uniform encryption strength across all roles, ensuring consistent key sizes, algorithms, and token formats. While MFA improves authentication and key rotation improves lifecycle management, neither directly resolves cryptographic inconsistency.

CEH v13 stresses that encryption should be role-agnostic and standardized. Therefore, Option C is correct.