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There is some software available for the isogeny key exchange. It was developed by one of the designers of the key exchange (DeFeo). It is available on GitHub her: https://github.com/defeo/ss-isogeny-software/ The key exchange was first published in late 2011 and its security has held up under analysis since then. A 2014 paper from Indocrypt supports ...


This [Carter-Wegman] MAC is not, in general, secure in the quantum setting This is true; however we need to ask "what is this setting, and is it a realistic one?" This setting is one where the adversary can ask queries that are composed of a superposition of quantum states, and the oracle returns the superposition of the answers. In other words, the ...


Actually, a post-quantum security is truly achieveable in a cipher-combo only. So - take a look at AES-finalist-candidates, like Serpent, and use it too or just it, but in 512 bit keys. Here is the starting point for you : enter link description here


Yes; virtually all of them. Quantum computers give a quadratic speedup on a general search problems (so key lengths need to double), but I don't know of any symmetric schemes in actual use for which quantum computation gives a bigger speedup.

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