38 Post Quantum Crypto for Dummies Key exchange Key-exchange schemes can easily be constructed from public-key encryption schemes by generating and transmitting new keys for each session. Specific key-exchange schemes provide better performance in respect to key-generation time and bandwidth demand. The fairly recent lattice-based key-exchange scheme NewHope requires to send network packages of about 2 kB compared to only 32–64 bytes for classical ECDH. The supersingular-isogeny scheme SIDH requires only 564 bytes and therefore is much closer to classical schemes. However, this scheme is very young and not well trusted.
PQC_for_Dummies
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