![]() ![]() the client's public key is sent enciphered, when we really need authentication, not really described. update: there is no stated safeguard to reduce the risks resulting from a poorly seeded or otherwise bad RNG being used at step 1., which times and times has occurred on the field.For example, your posted public key is a PEM encoded RSA public key in X.509/SPKI format and your posted private key a PEM encoded RSA private key in PKCS8 format. client draws a random AES key $K_\text$ ever leaks, the confidentiality of past recorded communications is compromised contrast that with protocols offering forward secrecy An HMAC uses a (random) byte sequence as key, RSA requires certain parameters (modulus, private exponent, public exponent etc.) which are provided in different key formats.
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