HID iCLASS SE Encoder User Guide - Manual (Page 183)

Glossary
April 2014 PLT-01067, Version: A.3
Glossary
Term Description
AES
Advanced Encryption Standard
The Advanced Encryption Standard (AES) is a specification for the encryption of
electronic data established by the U.S. National Institute of Standards and Technology
(NIST).
AES is based on a design principle known as a substitution-permutation network, and
is fast in both software and hardware. Unlike its predecessor DES, AES does not use a
Feistel network. AES is a variant of Rijndael which has a fixed block size of 128 bits,
The key size used for an AES cipher specifies the number of repetitions of
transformation rounds that convert the input, called the plaintext, into the final output,
called the ciphertext. The number of cycles of repetition are as follows:
10 cycles of repetition for 128-bit keys.
12 cycles of repetition for 192-bit keys.
14 cycles of repetition for 256-bit keys.
APDU Application Protocol Data Unit
AEAD Authenticated Encryption with Associated Data
CPO Custom Product Offering
DES
Data Encryption Standard
DES is a widely-used method of data encryption using a private (secret) key that was
judged so difficult to break by the U.S. government that it was restricted for
exportation to other countries. For each given message, the key is chosen at random
from among this enormous number of keys. Like other private key cryptographic
methods, both the sender and the receiver must know and use the same private key.
DES applies a 56-bit key to each 64-bit block of data. The process can run in several
modes and involves 16 rounds or operations. Although this is considered "strong"
encryption, many companies use "triple DES", which applies three keys in succession.
NIST National Institute of Standards and Technology
OEM Original Equipment Manufacturer
MAD MIFARE Application Directory
PACS Physical Access Control Solutions
SAM Secure Application Module
SE SIO-Enabled or Secure Element
SIO Secure Identity Object
SNMP Simple Network Management Protocol
SO Secure Object - Can have more than one per SIO