Table of Contents
Advertisement
3DES. Triple DES. Encryption operation which permutes 64 bit blocks of
plaintext with 64 bit keys three times. Triple DES is exponentially
stronger than single DES encryption.
Diffie-Hellman key exchange. A key exchange protocol allowing the
participants to agree on a key over an insecure channel.
Digest. Commonly used to refer to the output of a hash function, e.g. message
digest refers to the hash of a message.
Digital signature. The encryption of a message digest with a private key.
DMA. Direct Memory Access.
DSA. Digital Signature Algorithm. DSA is a public-key method based on the
discrete logarithm problem. Proposed by NIST.
DSS. Digital signature standard proposed by NIST.
E
EBI. External Bus Interface. A functional block in the MPC180E that
mediates between internal and external signals.
ECB. Electronic code book. A mode of DES which uses initialization vectors
that are not modified by processing of the previous packet.
ECC. Elliptic curve cryptosystem. A public-key cryptosystem based on the
properties of elliptic curves.
Elliptic curve. The set of points (x, y) satisfying an equation of the form
y2 = x3 + ax + b, for variables x, y and constants a, b Î F, where F is
a field.
Encryption. The transformation of plaintext into an apparently less readable
form (called ciphertext) through a mathematical process. The
ciphertext may be read by anyone who has the key that decrypts
(undoes the encryption) the ciphertext.
Execution unit. Any device or silicon block which accelerates the
mathematical transformations associated with key exchange, data
authentication, and bulk data encryption.
Exponent. In the binary representation of a floating-point number, the
exponent is the component that normally signifies the integer power
to which the value two is raised in determining the value of the
represented number.
External Bus Interface. See EBI.
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Glossary
Glossary-3
Advertisement
Table of Contents
