Private keys, 256 bits? | Bitcointalksearch.org

etotheipi

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Core Armory Developer

Quote from: Zeilap on March 30, 2013, 11:22:33 AM

Bitcoin uses ECDSA.

This.

ECDSA was picked for Bitcoin because it has much shorter keylengths than other digital signing scheme/crypto schemes. For instance, all the following keylengths are approximately equal in terms of mathematical entropy:

--3,072-bit RSA key
--256-bit ECDSA key
--128-bit AES key

There is no doubt that an AES 128 key is sufficient protection, probably for decades, if not longer (protection against well-funded attacker with a billion dollars of computing resources)

jackjack

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May Bitcoin be touched by his Noodly Appendage

Oh wow I didn't even check if they were the same... That seemed obvious to me
I feel dumb, but well, thanks!

Zeilap

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Bitcoin uses ECDSA.

jackjack

legendary

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Merit: 1280

May Bitcoin be touched by his Noodly Appendage

Hi all
I just asked Openssl to create a new DSA pkey of 256 bits.
This is what it answers:

Quote

private key length is too short; it needs to be at least 384 bits, not 256

Looks like it comes from here, where (newkey < MIN_KEY_LENGTH) is false because MIN_KEY_LENGTH=384

So what is happening here? Am I doing something wrong? Bitcoin uses a modified version of Openssl?

Topic: Private keys, 256 bits? (Read 1070 times)