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Title: Doubling or half of the private key range Post by: sss555 on April 23, 2016, 01:24:42 PM bitcoin private key range
n = 1 to FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364140 and p = FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F bitcoin public key x = 592152c398d6c719636a03a6dad64246a5a6814aa62c156b0ce5332f6759b031 y = 72dd2e1d26c233337760c49122a1df67d0aa792b453f97bd29765c83b47ba01d x = 79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798 y = 483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8 x= c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee5 y= 1ae168fea63dc339a3c58419466ceaeef7f632653266d0e1236431a950cfe52a x = e493dbf1c10d80f3581e4904930b1404cc6c13900ee0758474fa94abe8c4cd13 y = 51ed993ea0d455b75642e2098ea51448d967ae33bfbdfe40cfe97bdc47739922 Need to double (or) half the range of private key , so how to convert the bitcoin public key into doubled (or) half private key range n = 1 to ( FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364140 * 2 ) OR n = 1 to ( FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364140 / 2 ) Thank all Title: Re: Doubling the private key range Post by: cr1776 on April 23, 2016, 03:27:01 PM Double? Just add one bit to the representation and limits of each.
You should be able to find those lines in Bitcoin Core. Title: Re: Doubling the private key range Post by: achow101 on April 23, 2016, 04:58:58 PM Double? Just add one bit to the representation and limits of each. I'm pretty sure that is not how it works. The secp256k1 curve is only for 256 bit private keys. To double the range, you be using 257 bit private keys and that would require an entirely different curve.You should be able to find those lines in Bitcoin Core. Title: Re: Doubling the private key range Post by: cr1776 on April 23, 2016, 07:29:57 PM Double? Just add one bit to the representation and limits of each. I'm pretty sure that is not how it works. The secp256k1 curve is only for 256 bit private keys. To double the range, you be using 257 bit private keys and that would require an entirely different curve.You should be able to find those lines in Bitcoin Core. I was primarily joshing about the code since it really wasn't clear what they were asking without more context. 😀 Title: Re: Doubling the private key range Post by: sss555 on April 24, 2016, 04:41:09 AM Double? Just add one bit to the representation and limits of each. I'm pretty sure that is not how it works. The secp256k1 curve is only for 256 bit private keys. To double the range, you be using 257 bit private keys and that would require an entirely different curve.You should be able to find those lines in Bitcoin Core. if the range half means n = 1 to ( FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364140 / 2 ) Title: Re: Doubling or half ot the private key range Post by: kn_b_y on April 24, 2016, 11:21:48 AM bitcoin private key range n = 1 to FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364140 and p = FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F bitcoin public key x = 592152c398d6c719636a03a6dad64246a5a6814aa62c156b0ce5332f6759b031 y = 72dd2e1d26c233337760c49122a1df67d0aa792b453f97bd29765c83b47ba01d x = 79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798 y = 483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8 x= c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee5 y= 1ae168fea63dc339a3c58419466ceaeef7f632653266d0e1236431a950cfe52a x = e493dbf1c10d80f3581e4904930b1404cc6c13900ee0758474fa94abe8c4cd13 y = 51ed993ea0d455b75642e2098ea51448d967ae33bfbdfe40cfe97bdc47739922 Need to double (or) half the range of private key , so how to convert the bitcoin public key into doubled (or) half private key range n = 1 to ( FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364140 * 2 ) OR n = 1 to ( FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364140 / 2 ) Thank all Seems to me you could halve the range by performing the bitwise OR operation on your private key, forcing it to be an odd number. But you can't use Secp256k1 and double the range becuase for any value above FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364140 you'd be cycling over the same public keys. Title: Re: Doubling or half ot the private key range Post by: shinep on April 25, 2016, 01:51:33 AM May I ask why do we have to double the private key range?
To avoid possible collission? |