There’s rumors flying right now that single sig CC Mk3’s in particular may be affected by an attack which already drained 40 million dollars from about 500 users. I don’t know anything personally about what is actually happening but as a larger account on nostr i just wanted to post this as a community notice. Just in case. Check on your funds. Make sure you’re safe. Very little is known currently. image

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.'s avatar
. 3 weeks ago
Also, don't do anything rash.
I might know why this is happening but it is a guess. I would in general avoid almost every HWW on the market today due to repeating the same structural flaws
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jostric 3 weeks ago
An exchange wallet? Why 500 wallets. Just curious
Entropy is hard, little compute resources made that harder. I assume you're leaning on the entropy which is what I've always been concerned about and I think we've spent some time talking about.
I strongly suspect that it is not the entropy, we can get great entropy from small HW. There is something going terribly wrong higher up in the stack. It is very obscure but if it happened, this is most likely what hit Coldcard
I wouldn’t trust an all CC mutlisig, but multi vendor multi sig is confirmed safe.
Already got the rest of the wallet out and moved to an exchange. Needed to sell this over the next 3 months anyway
Rest was moved as soon as I found out about the vulnerability and is safely on an exchange Saw the notes circulating and immediately checked my wallet. realized a big chunk of utxos were moved last night… Immediately moved the rest out and accelerated the transaction
And yes it was a regular standard coldcard mk3 with no dice rolls or passphrase. My main vault is a multi sig with this same device as one of the 3 signers. Going to need to update that setup this weekend
The mk3 is only one of the signers. Other two are different vendors Regardless going to update that setup this weekend This really sucks and makes me question everything. Do I really want to keep having to worry about keeping my wealth secure in what should be secure setups?
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Pete 3 weeks ago
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Do you think a manufacturer who reserves proprietary ownership over their source has any liability? Like, saying "trust us" requires some kind of responsibility?
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