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Title: how to find find % of publick key ? Post by: COBRAS on April 09, 2022, 04:06:07 AM Publick key - 035091541F5851647A93DF0C14152A4516169B5BD6ACF793DEE8C9DFA27710E4B0
how to find 035091541F5851647A93DF0C14152A4516169B5BD6ACF793DEE8C9DFA27710E4B0 % 7890161 ? % - modulo Br Title: Re: how to find find % of publick key ? Post by: pooya87 on April 09, 2022, 04:10:35 AM The modulo operation makes no sense here.
You can multiply a point on an elliptic curve by a number and by extension you can divide it by a number but a point (that is x and y coordinates) doesn't have a remainder! Title: Re: how to find find % of publick key ? Post by: COBRAS on April 09, 2022, 04:23:26 AM The modulo operation makes no sense here. You can multiply a point on an elliptic curve by a number and by extension you can divide it by a number but a point (that is x and y coordinates) doesn't have a remainder! but privkey has... so, pubkey has too Title: Re: how to find find % of publick key ? Post by: CoinMagus on April 09, 2022, 09:45:45 AM even if it were possible, it would be indistinguishable from the partition, i.e. the private key would be out of range.
Title: Re: how to find find % of publick key ? Post by: garlonicon on April 09, 2022, 05:49:32 PM Quote but privkey has... so, pubkey has too Not at all. I told you: the private key is the relation between the base point and your point, so "basePoint*privKey=yourPoint". Your public key does not have a remainder, because the private key exists only for a given base point, for a different point it will have completely different value. So, you can have a "remainder" only for a pair of points, like (basePoint;yourPoint), but not for a single point.Title: Re: how to find find % of publick key ? Post by: COBRAS on April 09, 2022, 07:15:12 PM Quote but privkey has... so, pubkey has too Not at all. I told you: the private key is the relation between the base point and your point, so "basePoint*privKey=yourPoint". Your public key does not have a remainder, because the private key exists only for a given base point, for a different point it will have completely different value. So, you can have a "remainder" only for a pair of points, like (basePoint;yourPoint), but not for a single point.What you talk abour ? 1026 MOD 64 is : 2 minus mod - 2 1024 MOD 64 is : 0 so, if you substrack 2 from pubkey you down you range fro 1:1024 to 1: 16 !!! 2 is remainder !! not base point but no funtion for publick key ! how to find Title: Re: how to find find % of publick key ? Post by: COBRAS on April 10, 2022, 01:46:45 AM Quote but privkey has... so, pubkey has too Not at all. I told you: the private key is the relation between the base point and your point, so "basePoint*privKey=yourPoint". Your public key does not have a remainder, because the private key exists only for a given base point, for a different point it will have completely different value. So, you can have a "remainder" only for a pair of points, like (basePoint;yourPoint), but not for a single point.What you talk abour ? 1026 MOD 64 is : 2 minus mod - 2 1024 MOD 64 is : 0 so, if you substrack 2 from pubkey you down you range fro 1:1024 to 1: 16 !!! 2 is remainder !! not base point but no funtion for publick key ! how to find noone has idea how to calculate mod of pubkey ? Title: Re: how to find find % of publick key ? Post by: litecoin_messiah on April 10, 2022, 07:47:54 AM Quote but privkey has... so, pubkey has too Not at all. I told you: the private key is the relation between the base point and your point, so "basePoint*privKey=yourPoint". Your public key does not have a remainder, because the private key exists only for a given base point, for a different point it will have completely different value. So, you can have a "remainder" only for a pair of points, like (basePoint;yourPoint), but not for a single point.What you talk abour ? 1026 MOD 64 is : 2 minus mod - 2 1024 MOD 64 is : 0 so, if you substrack 2 from pubkey you down you range fro 1:1024 to 1: 16 !!! 2 is remainder !! not base point but no funtion for publick key ! how to find noone has idea how to calculate mod of pubkey ? i don't have time but play around with pycoin Quote ku 035091541F5851647A93DF0C14152A4516169B5BD6ACF793DEE8C9DFA27710E4B0 --json { "BTC_address": "12bahMGWAnSEYS3PKURvhScm8GmZhejY7t", "BTC_address_segwit": "bc1qzxpx2mkf25ungac3yfkm9k7nfde3ympzxk6sqj", "BTC_address_uncompressed": "16PvA358rPPhyirFyko9zRptKWL69EinoN", "address": "12bahMGWAnSEYS3PKURvhScm8GmZhejY7t", "address_segwit": "bc1qzxpx2mkf25ungac3yfkm9k7nfde3ympzxk6sqj", "address_uncompressed": "16PvA358rPPhyirFyko9zRptKWL69EinoN", "hash160": "1182656ec95539347711226db2dbd34b73126c22", "hash160_uncompressed": "3b2e26fcd8888c57d99652937ac9e975e9f64dd7", "input": "035091541F5851647A93DF0C14152A4516169B5BD6ACF793DEE8C9DFA27710E4B0", "key_pair_as_sec": "035091541f5851647a93df0c14152a4516169b5bd6acf793dee8c9dfa27710e4b0", "key_pair_as_sec_uncompressed": "045091541f5851647a93df0c14152a4516169b5bd6acf793dee8c9dfa27710e4b0ec29eeaf3d880 023f13d2608200ec283c971081ee88ec05247bf6d65b57e8537", "network": "Bitcoin mainnet", "p2sh_segwit": "3EZXJeaZVsF1eFFXyLGHZ6CBn1ctwC9fHx", "p2sh_segwit_script": "00141182656ec95539347711226db2dbd34b73126c22", "public_pair_x": "36441801302806618484038906762766908306697395008217419414017649305421238822064", "public_pair_x_hex": "5091541f5851647a93df0c14152a4516169b5bd6acf793dee8c9dfa27710e4b0", "public_pair_y": "106819920335407981491505420347768958799539175113579525933191638145241450448183", "public_pair_y_hex": "ec29eeaf3d880023f13d2608200ec283c971081ee88ec05247bf6d65b57e8537", "symbol": "BTC", "y_parity": "odd" } https://pycoin.readthedocs.io/en/latest/search.html?q=modulo&check_keywords=yes&area=default bit https://bit.dev/ is also good btw not sure if this helps but i ust got the x value (lttle endian) as int and did Quote ku 36441801302806618484038906762766908306697395008217419414017649305421238822064/odd Code: input : 364418013028066184840389067627669083066973950082174194140176493054\ it gave that Title: Re: how to find find % of publick key ? Post by: alexeyneu on April 12, 2022, 12:27:15 PM it's np to do.
use BN_hex2bn() and BN_nnmod() from <openssl/bn.h> (openssl's libcrypto) https://github.com/alexeyneu/BlockZero/blob/29ed505a211d14d4577012438cd8bec9d15f1272/connection/x.cpp#L287-L329 nnmod() hasn't been used there but it's straight thing to do. |