this is a license
http://www.cisco.com/en/US/products/hw/contnetw/ps792/prod_bulletin0900aecd803f859f.html
"WebNS Secure Management License: enables strong encryption"
They are not downloadable.
You have to contact licensing@cisco.com with the serial number of your CSS.
The license number is linked to the serial number, so it only works on one machine.
Moreoever, even if free, you still have to follow the normal order process to receive it.
[or contact licesing@cisco.com]
Gilles.
