Chapter 3
Configuration via Local Pages
Crypto The table below shows the encryption algorithms supported by the SpeedTouch™ along with their corresponding key size:
Algorithm
DES
Valid key lengths (bits)
56
3DES
168
AES
128, 192, 256
DES is relatively slow and is the weakest of the algorithms, but it is the industry standard.
3DES is a stronger version of DES, but is the slowest of the supported algorithms (for a comparable key length).
AES is the new encryption standard selected by the American government to replace DES/3DES. It is recommended to use AES since it is the most advanced of the supported encryption methods.
Integrity The SpeedTouch™ supports two types of hashing algorithms:
Hashing algorithm
MD5
SHA1
HMAC is always used as integrity algorithm, combined with either MD5 or
SHA1.
SHA1 is stronger than MD5, but slightly slower.
Group The table below shows the supported
| number of bits | Keyword |
number |
|
|
|
|
|
1 | 768 | MODP768 |
|
|
|
2 | 1024 | MODP1024 |
|
|
|
5 | 1536 | MODP1536 |
|
|
|
Lifetime measured in: | Minimum value | Maximum value |
|
|
|
seconds | 240 (=4 minutes) | 31536000 (=1 year) |
|
|
|
84 | |
|
