User`s manual

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DWS-1008 User’s Manual
D-Link Systems, Inc.
Appendix D - Glossary
cryptography
The science of information security. Modern cryptography is typically concerned with the
processes of scrambling ordinary text (known as plain text or clear text) into encrypted text
at the sender’s end of a connection, and decrypting the encrypted text back into clear text
at the receiver’s end. Because its security is independent of the channels through which
the text passes, cryptography is the only way of protecting communications over channels
that are not under the user’s control. The goals of cryptography are confidentiality, integrity,
nonrepudiation, and authentication. The encrypted information cannot be understood by
anyone for whom it is not intended, or altered in storage or transmission without the alteration
being detected. The sender cannot later deny the creation or transmission of the information,
and the sender and receiver can conrm each other’s identity and the information’s origin and
destination.
CSR
Certicate Signing Request. A message sent by an administrator to request a security certicate
from a certicate authority (CA). A CSR is a text string formatted by Privacy Enhanced Mail
(PEM) protocol according to Public Key Cryptography Standard (PKCS) #10. The CSR
contains the information needed by the certicate authority to generate the certicate.
CSV le
Comma-separated values le. A text le that displays tabular data in a comma-delimited
format, as a list of rows in which each column’s value is separated from the next by a comma.
A CSV le is useful for transferring data between database applications.
cyclic redundancy check
See CRC.
dBm
Decibels referred to 1 milliwatt (mW). A measurement of relative power related to 1 mW. For
example, 20 dBm corresponds to 10
20 dBm/10
= 100 mW.
decibels referred to 1 milliwatt (mW).
See dBm.
Data Encryption Standard
See DES.
delivery trafc indication map
See DTIM.
DES
Data Encryption Standard. A federally approved symmetric encryption algorithm in use for
many years and replaced by the Advanced Encryption Standard (AES). See also 3DES.