Which statement is true about Perfect Forward Secrecy (PFS)?
A. PFS is used to resolve compatibility issues with third-party IPsec peers.
B. PFS is implemented during Phase 1 of IKE negotiations and decreases the amount of time required for IKE negotiations to complete
C. PFS increases security by forcing the peers to perform a second DH exchange during Phase 2.
D. PFS increases the IPsec VPN encryption key length and uses RSA or DSA certificates.
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