Symmetric cryptography, hashing and PIN block sanity checking for EftPos developers


PIN

PAN (with check digit)
 icon48-arrow PlainText/PIN-block Unpacked (hex)
 ctb-right
Master key

Encrypted session key
 icon48-arrow Session key Unpacked (hex)
Cryptographic algorithms
Note: For AES-xxx, use Rijndael-128 with xxx key size.
CipherText/Digest/encr. PIN-block

Base64
Cipher block chaining mode
Note: nofb/ncfb=block-wise, ofb/cfb=byte-wise.
 Initialization vector
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