Field
Description
•
3
: DES is an older encryption algorithm, which is rated as
weak due to its small effective length of 56 bits.
•
3
: Rijndael has been nominated as AES due to its fast key
setup, low memory requirements, high level of security
against attacks and general speed. The partner's AES key
length is used here. If this has also selected the parameter
3
, a key length of 128 bits is used.
•
3' E
: Rijndael has been nominated as AES due to its
fast key setup, low memory requirements, high level of se-
curity against attacks and general speed. Here, it is used
with a key length of 128 bits.
•
3' B
: Rijndael has been nominated as AES due to its
fast key setup, low memory requirements, high level of se-
curity against attacks and general speed. Here, it is used
with a key length of 192 bits.
•
3'D
: Rijndael has been nominated as AES due to its
fast key setup, low memory requirements, high level of se-
curity against attacks and general speed. Here, it is used
with a key length of 256 bits.
Hash algorithms (Authentication):
•
$
(default value): MD5 (Message Digest #5) is an older
hash algorithm. It is used with a 96 bit digest length for
IPSec.
•
3%
: SHA1 (Secure Hash Algorithm #1) is a hash algorithm
developed by NSA (United States National Security Associ-
ation). It is rated as secure, but is slower than MD5. It is used
with a 96 bit digest length for IPSec.
•
>1$ D
: RipeMD 160 is a 160 bit hash algorithm. It is
used as a secure replacement for MD5 and RipeMD.
•
) B
: Tiger 192 is a relatively new and very fast al-
gorithm.
Please note that the description of the encryption and authen-
tication or the hash algorithms is based on the author’s know-
ledge and opinion at the time of creating this User Guide. In
particular, the quality of the algorithms is subject to relative as-
pects and may change due to mathematical or cryptographic
developments.
Gigaset Communications GmbH
13 VPN
hybird 120 Gigaset Edition
267