Re: Is There a Visor Security Model?

[Dan Geer]

    The Palm's security model is, by most accounts I've seen, non-existant.

The issue is the lack of memory protection, i.e., that there is no
protected space for keying material.  Visor is said to use the PalmOS
as is, so that is not a magic wand.  Of course, if your OS has no memory
protection, you can always rely on yet another external hardware 
device, as has already been mentioned.

--dan