Q: How can I know for sure that the seed phrase is unique to each card?
A: You can’t know that with 100% certainty unless you watch us make them. You should have a TNO policy when it comes to cybersecurity: trust no one. You protect your wallet by using a long and complex 25th word. Using the card without a 25th word should be avoided at all costs and should only used as a decoy wallet.
Q: How are you generating the 24 word seed phrases that you etch onto each card?
A: We download and run an offline copy of Ian Coleman’s BIP39 tool. The laser etcher setup has no connectivity to the internet.
Q: What wallets do you recommend that support 25th word?
A: Sparrow (Windows, Mac, Linux) is a good option because it also supports BIP86 (Taproot) addresses which are more private and slightly more secure. Electrum is generally a great option but still lacks Taproot support. ProtonWallet is one of the only mobile options that supports