Nortel Networks NN46120-104 - Manual (Page 181)

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Supported Cipher Strings and Meanings
The following table lists each supported cipher string alias and its
significance.
Table 7
Cipher Strings and Meanings
Cipher String Aliases Meaning
DEFAULT The default cipher list, which corresponds to
ALL@STRENGTH .
ALL All cipher suites except the eNULL ciphers,
which must be explicitly enabled.
HIGH Cipher suites with key lengths larger than 128
bits.
MEDIUM Cipher suites using 128 bit encryption.
LOW Includes cipher suites using 64 or 56 bit
encryption, but excludes export cipher suites.
EXPORT Includes cipher suites using 40 and 56 bit
encryption.
EXPORT40 Cipher suites using 40 bit export encryption
only.
EXPORT56 Cipher suites using 56 bit export encryption
only.
eNULL, NULL Cipher suites that do not offer any encryption
at all. Because the use of such ciphers pose
a security threat, they are disabled unless
explicitly included.
aNULL Cipher suites that do not offer authentication,
like anonymous DH algorithms. The use
of such cipher suites is not recommended,
because they facilitate man-in-the-middle
attacks.
kRSA, RSA Cipher suites using RSA key exchange.
kEDH Cipher suites using ephemeral Diffie-Hellman
key agreement.
aRSA Cipher suites using RSA authentication, which
implies that the certificates carry RSA keys.
SSLv3, SSLv2 SSL version 3.0 and SSL version 2.0 cipher
suites, respectively.
DH Cipher suites using DH encryption algorithms,
including anonymous DH.
Nortel VPN Gateway
User Guide
NN46120-104 02.01 Standard
14 April 2008
Copyright © 2007-2008 Nortel Networks
.