-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 9/17/2016 9:20 PM, Peter Todd via bitcoin-dev wrote: > The probability that all N blocks are found by dishonest miners is q^N,
That's the probability that dishonest miners find N blocks in a row immediately. What you want is the probability that they can build a chain N blocks long, taking the random-walk into account. So use Satoshi's formula from bitcoin.pdf, section 11. The results are remarkably different. In particular, q=.5 is totally insecure, since for any N, both factions are guaranteed to eventually possess a chain of length N anchored at x at some point during the wild reorg melee. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBAgAGBQJX4A60AAoJEG/AI00/Ca/qLmEP/0fg+XJQNexTTrS/aPqcIY00 KStPNIruJD4QA9zgyx4K3fCst85/L9rsmv/9Xo6tyn8oneAMjjVY57mTG3smhiXA Qfu9/tG0AHneRxEpRNDA/x4IwCrr1xACOaO26gEqs9zVIszIVQq4z3Vc54gj39VD 9Jpc0653RVqHhJFT4ozZkAzg2CcPMHOxi45ufBtScaJO2AwtcLvtVYaC1BE9itDM wDdAS175jq+LlV20Igaf/s4Cc9G3LWnrNqzVCPBr/ua4U60ZO+r3nLr9gYtYNR0H 37xgktNZA8D/YI8gjYZ5p11bIqCs4lRyI5LP3Rvh/+5zQu4hdi25HMoUMys/lw4c ABuUVLaCa2r7pH7QczUx4jWJslaHlZ4M6tMUJ7bGZpVcPmA8FOk0j+DLTfUmYVYi Eqc5cf2Z+PEc9kBmvsxQ351WjT7fq3OtZCcMH5dhpGv4NMuVBwQ38Dh3Pz8rhBPe pIXMUPkmdWdczjoACpjOHbhYffCI7zCvsypydnImF7FReohWPFSKdaeoSHxotHzb cy2EWZS2IM009qY3+jF1j3uj4bJfPSlgLgfUE23Bmvsp9PJi9W+FARbKJKxr6HaB vvMg6rMfU8uWElQqz19ixI55PUDmtugwXccyWvhcr0ueN1P6fpNxF36Q9zwS6/+D 4orUC+rp1yNTeddvaYDv =HS6r -----END PGP SIGNATURE----- _______________________________________________ bitcoin-dev mailing list bitcoin-dev@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
