# Tag Info

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Is there any chance of finding symmetric key from encrypted public key? The answer is no, assuming the symmetric key has sufficient entropy and a secure encryption algorithm and mode is used correctly. Modern ciphers like AES with proper secret keys are not vulnerable to known plaintext attacks. Why? This has been answered in an earlier question: Why ...

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I will address your question below, however I have a serious concern that I want to bring up first. I glanced at the $p$ used in ngx_ssl_dhparam, and it is not immediately obvious that it was chosen correctly. Unless you know that whoever generated that value knew what they were doing, you should select a different value. The security of DH depends on, ...

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"Serial concatenation" is not a standard term in cryptography. Without any further information, I would guess that it probably refers to just concatenation. If that's not what it refers to, then your spec is deficient and ambiguous; you'll need to consult with the author of the spec to ask for to clarify what they meant by that phrase.

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