And, if it's a secondary, mechanical unlock, then how does it prevent the hack at issue from being effective?
In other news, data can be exfiltrated from air-gapped computers if others can see the screen or hear the speaker. Even worse if they have WiFi installed on them.
You're making assumptions. Rather than run a desktop OS like Windows XP Professional, it's more likely running Windows XP Embedded, which is intended for this type of use.
it would be a good idea to have an old fashioned mechanical lock alongside the electronic stuff so if one system fails the other is still in operation? Also what happens in a power cut?
So, you seem to be describing this mechanical backup in two different ways - first, as a backup for the locking function. Second, as a backup for the _unlocking_ function. Which is it? Do you mean for the mechanical system to also need to be opened in order to open the safe, to protect against electronics hacks like this one and eliminating the advantages of an electronic lock? Or, do you mean it to allow the safe to be opened even if the electronics fail, reducing overall security?
I'd think his public library would be upset by that.
Hubs? Where does one get a hub which supports IBM PC Network (Sytek)?