It's likely the password you come up with will be better than the the unbroken 10 BTC WarpWallet challenge, so you have that assurance. Also, we implemented the

It's likely the password you come up with will be better than the the unbroken 10 BTC WarpWallet challenge, so you have that assurance. Also, we implemented the protocol twice, using two different software stacks, and checked we came up with the same answer. You can probably convince yourself that WarpWallet works as advertised with about 10 lines of Python. We did something like that when building it. Because we encourage running this thing on an airgapped machine, you mainly need to convince yourself that we're generating keys as advertised (and not from a small known pool). The airgap would prevent this page from sending data back to a server, even if there was logic to do so (which there isn't).