An attacker captures the encrypted communication between two par

ties for a week, but is unable to decrypt the messages. The attacker then compromises the session key during one exchange and successfully compromises a single message. The attacker plans to use this key to decrypt previously captured and future communicat

ions, but is unable to.

This is because the encryption scheme in use adheres to:

A. Asymmetric encryption

B. Out-of-band key exchange

C. Perfect forward secrecy

D. Secure key escrow