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Ciro Santilli (@cirosantilli, 34)

Pre-shared key

An overview of what you can do with a pre-shared key with tradeoffs can be found at: quantumcomputing.stackexchange.com/questions/142/advantage-of-quantum-key-distribution-over-post-quantum-cryptography/25727#25727 The options are:

one-time pad
symmetric encryption
authentication with some message authentication code protocol

Table of contents
- Message authentication code Pre-shared key

Message authentication code

Bibliography:

crypto.stackexchange.com/questions/59958/is-it-safe-to-hash-a-packet-with-a-shared-secret-to-prove-authenticity

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