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11729931 No.11729931 [Reply] [Original]

>elliptic curve cryptography exploit based on the prime-order 8 subgroup of the edward's 25519 standard

>> No.11730205

>>11729931
>zcash

>> No.11730263

>https://ianix.com/pub/ed25519-deployment.html
This 'edward's 25519 standard' seems to be used everywhere. Were fucked.

>> No.11730280

>>11729931
source?

>> No.11730299

>>11729931
Thanks. I just sold all my crypto before the market reacts to this.

>> No.11730314

>>11729931
Sauce me desu senpai. What's the matter, too much of a onions basedboy to gib sauce?

>> No.11730320

>>11730263

Everywhere except Holo.

Price has dipped. Fill your bags and strap in.

>> No.11731040

>>11730320
Will you drive me to the bank to withdraw money for it?

>> No.11731111
File: 109 KB, 292x270, Screenshot 2018-11-02 at 22.29.52.png [View same] [iqdb] [saucenao] [google]
11731111

>>11730280
>>11730299
>for any coin that performs their own elliptic curve multiplication on a basepoint that is non-standardised, for example any difiie-hellman exchange, it is possible to multiply a given point on the ed25519 curve that satisfies the cyclic subgroup with a prime-order of 8 or below and extract and provide a fraudulent edward's ellipcitc curve digital signature algorithm, signature

>> No.11731246

>>11731111
quads of truth

>> No.11731311

wtf I can not find this text anywhere

OP are you just trolling?
>>11729931
>>11731111

>> No.11731548

>>11731311
>if we let lowercase letters be scalars with corresponding curve points being the multiplicative of the scalars from the standardised (G) basepoint then; B (where B sits on a cyclic subgroup of primeorder 8) it holds that 8.B == B. thus, a given signature for the scalar `b` will satisfy both B and 8.B

>> No.11731872

>>11729931
>prime-order 8 subgroup
That doesn't mean anything ?
Is the order of the group prime, or 8 ?

>> No.11732259

>>11729931
The 16 words I always prayed to never hear

>> No.11732269
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11732269

>>11731548
> B===B

>> No.11732288

>>11731872
it's a subgroup so it's both

>> No.11732306

>>11729931
Based, pure math fags about to demolish the joke that crypto is

>> No.11732488

>>11732269
Wait until 8==D
Then the real fun begins