Questions tagged [elliptic]

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Using an ERC20 crowdsale for a non-Ethereum based coin

I am confused as to how a crowdsale works. If in a crowdsale, people give their Ethereum to a new coin to be entered in a smart contract. Doesn't that mean that the receiving end of the contract (...
3
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0answers
29 views

Cheap EC Operations on Unsupported Curves

I want to be able to verify signatures created by smart meters. Unfortunately, their signature algorithm doesn't use curve ALT_BN_128 but BrainpoolP256r1. I wrote this verification algorithm that ...
0
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1answer
32 views

ECC scalar multiplication

I'm now trying to use scalar multiplication to recover v, but I have questions with ECC scalar multiplication. I'm wondering if the following equations are correct. If scalar * P = Q, then scalar * (...
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0answers
17 views

Does value of v represent that coordinate y of (deterministic k * G) is even or odd in Ehereum?

I'm quite confused about whether value v is related to deterministic k derived from RFC6979. I know that we can try 4 possibilities of v and compare to public key. And if (lower r, y is even), then ...
3
votes
0answers
90 views

VM revert on Scalar Multiplication in pre-compiled contracts

I tried to build a wrapper around the precompiled contracts as follows: https://gist.github.com/AlexXiong97/9c24bbd4541323a61fa63100860a5f89 If you paste it into Remix and deploy it, inputting any (...
0
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1answer
29 views

discover if a binary data contains Ethereum address in it?

Is there a way to guess, with some level of probability , that a 20 byte array is an Ethereum address, besides doing a query against the current StateDB and its history ? I want to discover hidden ...
1
vote
2answers
193 views

Can private keys change once created?

Can private keys change once the public key (address) is created?