SteelHeadā„¢ Deployment Guide - Protocols : Citrix ICA Optimization : Citrix SecureICA Encryption
  
Citrix SecureICA Encryption
SecureICA is a Citrix ICA protocol feature that encrypts the session data transmitted between Citrix clients and servers. By default, all Citrix ICA sessions have SecureICA set to basic ICA protocol encryption. The basic ICA protocol encryption setting obfuscates data but does not provide industry standard encryption. Other settings are available to increase the level of encryption using the RC5 algorithm.
For more information about SecureICA, go to http://support.citrix.com/proddocs/topic/infocenter/ic-how-to-use.html.
RiOS supports optimization of Citrix ICA sessions with SecureICA set to RC5 40-, 56-, and 128-bit encryption. By default, RiOS can optimize Citrix ICA traffic with SecureICA set to basic ICA protocol encryption. You must enable SecureICA encryption to allow RiOS to optimize ICA sessions with SecureICA encryption set to RC5 on both the client-side and the server-side SteelHeads.
To enable RiOS to optimize Citrix Sessions with SecureICA encryption set to RC5 SecureICA
From the SteelHead Management Console, choose Optimization > Protocols: Citrix.
Select Enable Citrix Optimization.
Specify the ICA port and session reliability port.
Select Enable SecureICA Encryption.
Click Apply to apply the settings to the running configuration.
Restart the optimization service.
You must perform this configuration on both the client-side and server-side SteelHeads.