[valarauca1]

I write software that runs on tanks, its not bullet proof. Most the communication protocols just use security though obscurity. If you tell a gear box to shift form 1st to snip it'll do it, and break everything.

But when you considered air gap, and physical security surrounding it (12 inches of plate steal, 5 man team with guns, massive main gun), its pretty secure.

[dhimes]

Except the software running a tank.

I write software that runs on tanks

Ha! Only on HN...

[mschulkind]

I'm thinking the joke is that, since the software runs inside the tank, which itself is bulletproof, the software is literally bulletproof since you can't shoot it with a bullet.

[clhodapp]

I think it was a joke... You can fire bullets at the tank and the stuff inside is fine.

[valarauca1]

It is, but vehicles including tanks and other armored things use horribly insecure serial protocols for communication. Which is no joke :\

[al2o3cr]

Only for suitably small values of "bullet". :)

[baddox]

Not unless you're defining "bullets" to exclude things like https://en.wikipedia.org/wiki/Depleted_uranium#Ammunition.

[dfc]

Modern tanks have steel armor plates that are 12 inches thick?

[tacticus]

i think they measure tank armour as equivalent to RHA steel

so it probably isn't steel in large quantities just as good as 300mm of RHA

[mpyne]

I've used important software for submarines. OPSEC limits what I can say, but let's just say I wasn't very impressed.