FYI, this page https://libsodium.gitbook.io/doc/secret-key_cryptography/aead … has been very useful to help us validate that we’re not going to do something stupid.
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Glad you found that documentation useful!
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Fun topic, here's an idea. Say we want to encrypt a table of (key, value). Encrypt key using Deterministic AEAD (e.g., AES-SIV) with the table name as associated data. Encrypt value using AEAD (e.g., XChaCha20Poly1305) with the encrypted key as associated data. Let's discuss!
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It’s a fun topic indeed, but on this occasion I would prefer a quick cheat sheet so that I can get on with other things :) From some searching on the Internet, that may be overly optimistic. We also need a good threat model + pitfalls guide.
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I don't have a step-by-step guide on hand but I wrote a tool that probably solves this general class of problems and I'm porting it to Node.js, Java, C#, and Rust.
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