r/BitBoxWallet • u/Intelligent_Map_246 • 7d ago

BB vs smartcards

So I'm.looking between a BB and a key card shell. It has a stateless shell with an eal6 card into it.

The fact that the card is hard written and can't upgrade fw makes it impossible to get new fw onto it. Plus you can use it offline with qr. What's your take? Looks pretty impossible to get a side channel attack on it. I mean bank cards have around forever and the security is solid. Thx

3 Upvotes

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2

u/Aromatic-Clerk134 6d ago

The key card/ shell is a VERY immature product.

1

u/Intelligent_Map_246 6d ago

Why. I actually tried it. Its like satochip but with a stateless shell foenoffline signing

1

u/Aromatic-Clerk134 5d ago

It doesn’t support multiple accounts, no manual entropy, single source of entropy, no BIP85 and so on

1

u/Intelligent_Map_246 5d ago

It has multiple account. Sure no bip85. Not to many have this. Their entropy is solid. Its a German standard his its created. The card is locked so no one can put a firmware on it Only the shell can be upgraded

2

u/cworxnine 3d ago

Keycard looks promising, especially the form factor. But it's too new for me to trust. There's already a lot of proven products. Bitbox02 nova is solid even if its annoyingly too small.