PKCS

There are a lot of PKCS #X standards, maybe the most common one is RSA keys since you may have seen it quite often(something like server.key) when updating a website’s certificate.

Public Key Cryptography Standard(PKCS)

There are a lot of PKCS #X standards, maybe the most common one is RSA keys since you may have seen it quite often(something like server.key) when updating a website’s certificate.