Hi,
V2 onions are a truncated SHA1. Doing an entire hash is expensive.
V3 onions are an ed25519 key plus a suffix. So if you're just looking
for a prefix, you can choose a random value. Then increment by the
basepoint until you find the prefix you want. (This is a relatively
cheap operation, because you're just adding 255-bit numbers.)
You can save the expensive suffix calculations for the final
candidate keys.
Here's one implementation:
This is a summary: there are a few important details to get right,
like key masking and security.
T
--
teor
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On 27 Apr 2020, at 06:37, niftybunny <abuse-contact@to-surf-and-protect.net> wrote:
Hi there,
quick question. Is there a fundamental time difference between brute forcing V3 to V2 Onion domains or did my 4 lucky feet just stopped working?
niftybunny
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