WAN optimization without required user configuration for WAN secured VDI traffic

In order for intermediary WAAS devices to process and accelerate ICA traffic, they must decrypt the ICA traffic in order to examine it. Disclosed is a mechanism by which the ICA traffic may be re-encrypted for transport over the WAN in a manner that does not require explicit configuration by the administrator of the WAAS devices. For example, VDI traffic may be intercepted and all data redundancy elimination messages may be encrypted and sent to a peer network device.