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Title: 9 word electrum seed creates same wallet as 11 word ?! Post by: wingsuit on December 05, 2013, 06:12:35 AM If you restore from seed with these words "content scene son door spend plastic clothes talk reason" (9 words)
The first address is this "13VfVDEPU4RDKPtLmQ3jhCsnrj9JwVpgkq" If you restore from seed with these words "content scene son door spend plastic clothes talk reason damn haunt" (11 words) The first address is this again "13VfVDEPU4RDKPtLmQ3jhCsnrj9JwVpgkq" It is the exact same wallet! What is going on... ??? Title: Re: 9 word electrum seed creates same wallet as 11 word ?! Post by: ThomasV on December 05, 2013, 06:15:27 AM yes, the seed is encoded using groups of 3 words, extra words are ignored.
(note that version 2.0 will use a hash of the seed phrase) Title: Re: 9 word electrum seed creates same wallet as 11 word ?! Post by: wingsuit on December 05, 2013, 06:21:20 AM yes, the seed is encoded using groups of 3 words, extra words are ignored. (note that version 2.0 will use a hash of the seed phrase) Okay thank you, cheers for the time spent coding all this. Title: Re: 9 word electrum seed creates same wallet as 11 word ?! Post by: ThomasV on December 05, 2013, 06:21:42 AM yes, the seed is encoded using groups of 3 words, extra words are ignored. (note that version 2.0 will use a hash of the seed phrase) How come it does not warn the user when entering a short seed? This significantly increases the chance of a collision. you are right, it should warn the user. however, the software only generates seeds with 12 words. there can be a collision only if users invent a seed, and "restore" from it Title: Re: 9 word electrum seed creates same wallet as 11 word ?! Post by: Abdussamad on December 05, 2013, 09:05:08 AM On a related question, will seeds that are more than 12 words (and multiples of 3) always be supported? It came up in this thread where hobbes talks about concatenating 2 wallet seeds to create a 24 word seed:
https://bitcointalk.org/index.php?topic=354261.0 Title: Re: 9 word electrum seed creates same wallet as 11 word ?! Post by: ThomasV on December 05, 2013, 05:57:05 PM On a related question, will seeds that are more than 12 words (and multiples of 3) always be supported? It came up in this thread where hobbes talks about concatenating 2 wallet seeds to create a 24 word seed: https://bitcointalk.org/index.php?topic=354261.0 in version 2.0, the seed phrase will be hashed in order to generate the master public key. thus, any phrase length will be supported. However, in order to recognize seeds from version < 2, I plan to check if the number of words is 12. so it's probably not a good idea to create 24 words seeds now. Title: Re: 9 word electrum seed creates same wallet as 11 word ?! Post by: wingsuit on December 06, 2013, 02:36:25 AM However, in order to recognize seeds from version < 2, I plan to check if the number of words is 12. so it's probably not a good idea to create 24 words seeds now. What will the default seed length in 2.0 be then? Title: Re: 9 word electrum seed creates same wallet as 11 word ?! Post by: hobbes on December 06, 2013, 01:00:03 PM On a related question, will seeds that are more than 12 words (and multiples of 3) always be supported? It came up in this thread where hobbes talks about concatenating 2 wallet seeds to create a 24 word seed: https://bitcointalk.org/index.php?topic=354261.0 in version 2.0, the seed phrase will be hashed in order to generate the master public key. thus, any phrase length will be supported. However, in order to recognize seeds from version < 2, I plan to check if the number of words is 12. so it's probably not a good idea to create 24 words seeds now. Probably there will have to be an option or some way to tell the program whether the seed is old or new... or will the new seed have a different number of words? |