Written by 3.7.2 Entropy in cryptography So, why is entropy so fundamental to cryptography? If the source used to generate secrets (or unique values used in cryptographic protocols) has a poor entropy, the number of values that can be possibly drawn from that source will be limited, and some values will be (much) more likely than others. […]
Frequently changing keys also limits the exposure time of a key compromised by Mallory. If the extracted key is used only for a single communication session, Mallory cannot decrypt previous sessions and needs to repeat the extraction (and hope that her malware won’t be detected by Alice’s virus scanners, firewalls, and intrusion detection systems) to […]