Ciro Santilli
OurBigBook.comAn 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