User guide

User Guide 167
compression function
A function that takes a fixed-size input and returns a shorter, fixed-sized
output.
connected enterprise
A company or organization with a computer network exchanging data with the
Internet or some other public network.
Control Center
See
System Manager .
Control Panel
The set of Windows NT, Windows 2000, and Windows XP programs used to
change system hardware, software, and Windows settings.
conventional encryption
Encryption that relies on a common passphrase instead of a public key
cryptography. The file is encrypted using a session key, which encrypts using a
passphrase that a user is asked to choose.
cookie
A file or token passed from the Web server to the Web client (a user’s browser)
that is used to identify a user and could record personal information such as ID
and password, mailing address, or credit card number.
coprocessor
A separate processor designed to assist in specific functions, such as handling
complex mathematics or graphics, and to temporarily reduce the workload of
the microprocessor.
corporate signing key
A public key that is designated by the security officer of a corporation as the
system-wide key that all corporate users trust to sign other keys.
CPU (central processing unit)
The microprocessor chip that interprets and carries out instructions. Also, simply,
a term for a computer.
cracker
A codebreaker; a person who attempts to break encryption, software locks, or
network security. Can also be used as a synonym for hacker.
CRL
See
certificate revocation list .
cross-certification
Two or more organizations or certificate authorities that share some level of
trust.
crossover cable
A cable in which the receive and transmit lines (input and output) are crossed.
Crossover cables are necessary to connect hubs.