PFS, PFX, ECB

PFS stands for Perfect Forward Secrecy. It's a cybersecurity feature that ensures that session keys used in secure connections are unique and not derived from long-term keys. This prevents compromising large amounts of encrypted data if a session key is compromised in the future.

• PFX - Personal Information Exchange. It's a file format used to store cryptographic certificates and private keys.

• ECB - Electronic Codebook. It's a mode of operation for a block cipher, where each block of plaintext is encrypted with the same key independently.