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Author Topic: Signature - rsz - private key - ECDSA - calc - public key  (Read 263 times)
WCX-SCAM (OP)
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January 19, 2023, 09:02:38 PM
Last edit: January 19, 2023, 09:16:47 PM by WCX-SCAM
 #1

Hello! I have 2 signatures offline with the same private key and I would like to know if my private key is at risk.
The attacker knows the difference between k-d of the 2 signatures

signature 1

k-d = 0x99efbe8ab7519fb46bf1f6dd4fedf30a7677ccec3c241e72fb2abff5313c779b

r   0x74fd78ede0ab694817af40f20d560ff9f6c87aa251e5c55970fef4e178d09caa
s   0x74fd78ede0ab694817af40f20d560ff9f6c87aa251e5c55970fef4e178d09caa
z   0x44770e65060202ece64ebe8e44f5d170495957b1e1d18cf7858ccf0e2875b6be

pk  02eca578ddd2489b985da93bd038d1f42a4be72095a6139ecd65bdd0a475e5f065



signature 2

k-d = 0xa2c7aa00be5ba8633bb3d8bbace336d4a64075b3365fbe72fb2abff5313c779b

r   0x4a4a0513337795fcce89cfb11f961cd8ff446cdb88a3f3767965ac8b9e8da8c4
s   0x4a4a0513337795fcce89cfb11f961cd8ff446cdb88a3f3767965ac8b9e8da8c4
z   0xc11ac33c48cf04f19be3c37326b09ca1878d1ac7378d6c57fdd6f2fd3b551b53

pk  02eca578ddd2489b985da93bd038d1f42a4be72095a6139ecd65bdd0a475e5f065
mamuu
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January 20, 2023, 12:47:13 AM
 #2

(s1*r2-s2*r1) %N = 0

these signatures have the same root so you can't break them.

1DWA3Sa8i6eHVWV4AG4UP2SBhYB2XrfiHW
WCX-SCAM (OP)
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January 20, 2023, 02:36:38 PM
 #3


Q: I have 2 signatures offline with the same private key and I would like to know if my private key is at risk

A: Yes



They were generated without internet access, the device was destroyed and the private key is encrypted

I don't think it's risky. RIGHT?
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