9 word electrum seed creates same wallet as 11 word ?!

hobbes

full member

Activity: 128

Merit: 107

Quote from: ThomasV on December 05, 2013, 12:57:05 PM

Quote from: Abdussamad on December 05, 2013, 04:05:08 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://bitcointalksearch.org/topic/how-to-safely-split-mnemonic-seed-354261

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.

Maybe you could allow 12 OR 24 words. 24 words allow for safe (??) and simple key splitting.

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?

wingsuit

member

Activity: 64

Merit: 10

2100 trillion sats baby

Quote from: ThomasV on December 05, 2013, 12:57:05 PM

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?

ThomasV

legendary

Activity: 1896

Merit: 1353

Quote from: Abdussamad on December 05, 2013, 04:05:08 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://bitcointalksearch.org/topic/how-to-safely-split-mnemonic-seed-354261

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.

Abdussamad

legendary

Activity: 3682

Merit: 1580

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://bitcointalksearch.org/topic/how-to-safely-split-mnemonic-seed-354261

ThomasV

legendary

Activity: 1896

Merit: 1353

Quote from: ?? on ??

Quote from: ThomasV on December 05, 2013, 01:15:27 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)

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

wingsuit

member

Activity: 64

Merit: 10

2100 trillion sats baby

Quote from: ThomasV on December 05, 2013, 01:15:27 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)

Okay thank you, cheers for the time spent coding all this.

ThomasV

legendary

Activity: 1896

Merit: 1353

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)

wingsuit

member

Activity: 64

Merit: 10

2100 trillion sats baby

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... Huh

Topic: 9 word electrum seed creates same wallet as 11 word ?! (Read 1447 times)