ASN.1 and PKCS/CMS

• ASN.1 encodings: BER, CER, DER

• PKCS/CMS standards by RSA

• Block cipher modes of operation

• Initialisation Vectors

• Padding Schemes, Salt

• Striking example (Linux Tux penguin image) of ECB leaking information at http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation