R5
SUPREME Secure W-AIS System
CONFIGURATION
7000 118-524, C1
Page 30
1. Choose the desired key length of 128, 192 or 256 bits
2. Choose the input method (hexadecimal or numerical).
3. Fill in the encryption key data in the key parts parameter fields. The number of
key part fields will vary depending on chosen key length.
4.
Press “Save”
5.
A confirmation popup will appear, press “Yes”.
6. A virtual keyboard will appear. Input the correct user level password and press
ENTER on the virtual keyboard to set the encryption key in the transponder.
The key will be valid forever or until the next encryption key in the key list becomes
valid.
NOTE: Make sure that the same key length, input method and key data parts is
input for all R5 W-AIS transponder systems that need to communicate with each
other.
3.5.5
Keys Received on Secure Link
The R5 SUPREME CDU can receive secure keys from another user on the secure link.
This is only possible if the sender and receiver is using the same key and shares the
same organisation id. To manage keys received on secure link, navigate to
Main Menu
Maintenance
Configuration
W-AIS
Encryption Keys
Keys Received
on Secure Link
Figure 19
– Keys Received on Secure Link
If new secure keys are received on the secure link, the icon
is displayed in the
status bar. The list displays the received keys including sender. Received keys can
either be set or deleted.
3.6
Set Secure Time
The automatic encryption key handling in the R5 SUPREME W-AIS Transponder cannot
function without correct time/date information. The transponder will receive time from the
internal GPS receiver. If the internal GPS receiver is not functioning or position fix is not
available, the transponder will synchronize on received base station messages on the
VHF link. If neither of these time sources are available, it is possible to force set the time
in the transponder from the R5 SUPREME CDU so that the key handling will continue to
work. The time in R5 SUPREME Transponder can be set from the
Secure Time
view
