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Questions tagged [ecdsa]

The Elliptic Curve Digital Signature Algorithm

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1answer
101 views

OpenSSL bitcoin addresses generation

Using OpenSSL ver 1.1.0h on win 8.1 - 32 bit Im trying to recreate this post using cmd: OpenSSL generate Bitcoin address But on step 3: openssl ec -in c:\keys\private.pem -outform DER|tail -c +8|...
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0answers
26 views

How to figure out the coordinates of a compressed G point?

I really can't get my head around this ECDSA thing... So far I know that it's used for validating transactions by having a private key sign its signature to the transaction. I've come to the math part ...
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How verify p2sh spending transaction signature using public key with btcsuite?

I'm trying to verify inputs signatures in Go using Verify Signature script of package btcec. Decoding this p2sh spending transaction rawSpendingTxd := ...
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0answers
556 views

Is the following a valid bitcoin private key? - FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFE

In secp256k1 (Bitcoin's elliptic curve) it is defined that valid private keys may range from 1 to FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFE BAAEDCE6 AF48A03B BFD25E8C D0364141 - 1. (https://crypto....
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0answers
553 views

Cryptocurrencies based on RSA instead of ECDSA

Bitcoin is based on ECDSA. Does anyone know of cryptocurrencies based on RSA for authentication?
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0answers
2k views

Same identical R value of all transaction not provide corresponding privatekey

ECDSA Signature and the “z” value from above link learn calculation of z value and to get private key https://blockchain.info/tx/9ec4bc49e828d924af1d1029cacf709431abbde46d59554b62bc270e3b29c4b1 ...
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0answers
629 views

How do I get hash to verify transaction?

If I have the public key and signature for a transaction how do I get the hash value that is used in verify(hash, sig, pubkey). I want to know how to work backwards from a raw transaction to get it, ...
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99 views

Would it be possible for an 8-bit microprocessor to create a bitcoin keypair?

Context for question: With the latest security breaches around modern CPU's (Spectre / Meltdown) I was wondering if we could generate ECDSA keypairs on cheap, small and/or simple air gapped (micro)...
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How to make calculations using Decimal to Hex converter?

Help me understand this article ECDSA Signature and the “z” valueI have questions on the calculation of these formulas? I use to calculate MATLAB all the values ​​I converted via (Decimal to Hex ...
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0answers
875 views

Any bitcoin transaction to get S1 and Z1 and R value script need

bitcoin transaction to get S1 and Z1 and R value script need Need script that gives bitcoin translation to S1 and Z1 and R value like below link http://2coin.org/txinfo.aspx?txid=...
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372 views

How do you do point multiplication in bitcoin associated with the ecdsa algorithm?

I have posted a similar question recently, but not this specific. I have found that a lot may ride on the idea of "point multiplication" yet all explanations I have found lack explanation or are in ...