[rightbyte]

Sounds cheaper to run job batches on a local server then to run them encrypted on a remote mainframe, if you want that level of security.

I mean what is the switching overhead of signing the VM memory.

[Reelin]

> I mean what is the switching overhead of signing the VM memory.

Not much. The crypto is implemented in hardware. It's transparently added and removed as data is stored to and fetched from memory. The CPU contains unencrypted data but the rest of the components never see the plaintext.