PKCS stands for Public Key Cryptography Standards. They were developed by RSA Data Security. These standards act as a means of interoperability between the vendors out there. There are 15 parts, but numbers 2 and 4 have been rolled into PKCS #1.
PKCS #1 is encryption using the RSA algorithm. PKCS #3 uses the Diffie-Hellman algorithms. It is how you exchange a key between two people. PKCS #5 covers passwords.
PKCS #6 is the extended certificate syntax. It describes the extra information like e-mail addresses within certificates. PKCS #7 covers the use of envelopes. An example is S/MIME.
PKCS #8 is for private key encryption. I will cover PKCS 9 through 15 next time around. Be ready for things such as Cryptoki.
Good-fast-cheap. Pick two. - I got invited to a meeting with the customer today. There was a problem in production. And the customer wanted answers. When it came time, I explained wha...