Glossary
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Cisco Router and Security Device Manager Version 2.2 User’s Guide
OL-4015-08
cookie A cookie is a web browser feature which stores or retrieves information, such as
a user's preferences, to persistent storage. In Netscape and Internet Explorer,
cookies are implemented by saving a small text file on your local hard drive. The
file can be loaded the next time you run a Java applet or visit a website. In this
way information unique to you as a user can be saved between sessions. The
maximum size of a cookie is approximately 4KB.
CPE customer premises equipment.
CRL certificate revocation list. A list maintained and signed by a certificate authority
(CA) of all the unexpired but revoked digital certificates.
cryptography Mathematical and scientific techniques for keeping data private, authentic,
unmodified, and non-repudiated.
crypto map In SDM, crypto maps specify which traffic should be protected by IPSec, where
IPSec-protected traffic should be sent, and what IPSec transform sets shou ld be
applied to this traffic.
D
data confidentiality The result of data encryption that prevents the disclosure of information to
unauthorized individuals, entities, or processes. This information can be either
data at the application level, or communication parameters. See traffic flow
confidentiality or traffic analysis.
data integrity The presumed accuracy of transmitted data — signifying the sender’s
authenticity and the absence of data tampering.
data origin
authentication
One function of a non-repudiation service.
decryption Reverse application of an encryption algorithm to encrypted data, thereby
restoring that data to its original, unencrypted state.
default gateway The gateway of last resort. The gateway to which a packet is routed when its
destination address does not match any entries in the routing table.