In cryptographic terms, what is meant by 'perfect forward secrecy'?
- Achieves absolute security against quantum attacks
- Encrypts data using advanced mathematical functions
- Ensures that past communications remain secure
- Keys used for communication are ephemeral
Perfect forward secrecy (PFS) refers to the property where keys used for communication are ephemeral and not derived from long-term secrets. This ensures that even if a long-term key is compromised, past communications remain secure. Understanding PFS is crucial for designing secure communication systems, especially in scenarios where long-term key compromise is a concern.__________________________________________________
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