The `n` is the curve order, as shown here: https://en.bitcoin.it/wiki/Secp256k1
This step is necessary to keep you on the curve. The secp256k1_ec_privkey_tweak_add function from libsecp256k1 handles this automatically, but if you use OpenSSL or some non-EC math library, you probably have to do it yourself. -William On Fri, Jun 12, 2015 at 11:22 AM, James Poole <ja...@microtrx.com> wrote: > Looking at the BIP32 definition, I hit a line that I would appreciate > clarification on. > > https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki > > Under the section "Private parent key → private child key" there is a step: > > "The returned child key ki is parse256(IL) + kpar (mod n)." > > Can someone help me understand what "n" is in the context of this algorithm? > I very well could be looking right at it, but wanted to double check if I am > missing something. > > Thanks, > James ------------------------------------------------------------------------------ _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
