Enable Mode Commands : System administration commands : image signing enable
  
image signing enable
Enables and disables the signature verification feature for software images.
Syntax
[no] image signing enable
Parameters
None
Usage
Before you install a software upgrade, you can verify the integrity and authenticity of the package and ensure it is an unmodified and approved Riverbed image. The feature requires a public key in a certificate to verify the software image’s digital signature. During the verification process, the appliance compares the signature in the image with the Riverbed public certificate. The certificate is automatically installed, but it can also be manually obtained from the Riverbed Support site and added to the appliance. By default, image signature verification is on.
Example
amnesiac (config) # image signing enable
Product
SCC, SteelHead CX, SteelHead-v, SteelHead-c, Mobile Controller
Related Commands
“show image signing,” “show image certificate,” “image cert import,” image signing verify