Also known as PKCS
Public Key Cryptography Standards (PKCS) are a group of public-key cryptography intervendor standards first developed by RSA Security, with involvement from Apple, Digital, Lotus Software, Microsoft, MIT, Nothern Telecom, and Sun Microsystems, first published in June 1991.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).