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I am new KDFs. I need backgrounds of KDF and ASN x9.63, HKDF using Java

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JavaCard 3.1 introduces this KDF as part of this release. Can someone help me in understanding this topic clearly? (KDF ANS X9.63). I need some parameters informations. What is shared secret and shared Info, differences between them, how they are generated etc.. How to validate and corresponding code in Java ? to assert the outputs from Javacard & Java to be the same.Some unit testing to be done from my side.

Similarly the same is also requested for HKDF.

Thanks in Advance !!!

kelalaka avatar
in flag
Welcome to Cryptography.SE. This is a question-and-answer site. Not lecturing site. What did you read and what is not clear for you. Your question is lack of reading/search and too broad to be answered. Here [HKDF](https://crypto.stackexchange.com/q/76588/18298), for example.
kelalaka avatar
in flag
and [Formal description of KDF1 and KDF2](https://crypto.stackexchange.com/q/67280/18298)
kelalaka avatar
in flag
Another [Security of KDF1 and KDF2 (hash based KDF's)](https://crypto.stackexchange.com/q/15673/18298)
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