ATEN KN Series 32-Port KVM over IP Switch with Dual Power/LAN (1-Local + 4-Remote Access) - Manual (Page 199)

Chapter 8. Device Management
181
Encryption
These flexible encryption alternatives for keyboard/mouse, video, and virtual
media data let you choose any combination of DES; 3DES; AES; RC4; or a
Random cycle of any or all of them.
Enabling encryption affects system performance – no encryption offers the
best performance; the greater the encryption the greater the adverse effect. If
you enable encryption, the performance considerations are as follows:
Š
RC4 offers the least impact on performance; DES is next; then 3DES or
AES
Š
The RC4 + DES combination offers the least impact of any combination