What is the ECC key length for OpenCoin's implementation of Ripple?

3

http://www.reddit.com/r/Bitcoin/comments/1lubl1/wired_oped_worries_that_elliptic_curve/cc2vhos suggests that key lengths < 500 bits are no longer considered secure from the NSA. What key length is Ripple using?

user6660

Posted 2013-09-06T16:46:33.513

Reputation: 31

Answers

3

Ripple uses the same signature scheme as Bitcoin, 256-bit ECDSA keys and elliptic curve SECP256k1. It takes about 5 times more CPU effort to verify a 512-bit ECDSA signature than a 256-bit ECDSA signature and signature verification is a huge CPU load for both Bitcoin and Ripple. And, of course, keys and signatures are twice as long.

David Schwartz

Posted 2013-09-06T16:46:33.513

Reputation: 46 931

Asked: 2013-09-06T16:46:33.513

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Active: 2013-09-09T20:13:44.597