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Title: Network split vulnerability in Peercoin protocol v0.3 Post by: rat4 on July 08, 2014, 05:44:01 PM Network split vulnerability in Peercoin protocol v0.3
Peercoin v0.3 introduced a stake modifier which is computed from hashes of block signatures. The problem is that signatures are malleable, for details see https://en.bitcoin.it/wiki/Transaction_Malleability#Signature_Malleability All an attacker needs to do, is to setup a node that relays blocks with malleated signatures. Eventually the network will disagree on the stake modifier and thus will fork. Peercoin v0.4 (actual version) and NovaCoin are not vulnerable. |