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1、DDoSCoin:CryptocurrencywithaMaliciousProof-of-WorkEricWustrowBenjaminVanderSlootUniversityofColoradoBoulderUniversityofMichiganewust@colorado.edubenvds@umich.eduAbstractAlthoughtheproof-of-workusedinBitcoingivesitresistancetosybilattacks,theamountofcomp
2、utationalSinceitscreationin2009,Bitcoinhasusedahash-effortcarriedoutcollectivelybyitsminersdoesnotcon-basedproof-of-worktogeneratenewblocks,andcreateatributetoanyusefulproblemsbesidessecuringthecur-singlepublicledgeroftransactions.Thehash-basedcom-rency
3、fromattack.Indeed,thiscomputationaleffortissub-putationalpuzzleemployedbyBitcoinisinstrumentaltostantial:Asof2016,minerscollectivelyperformroughlyitssecurity,preventingSybilattacksandmakingdouble-186010(orabout2)hasheseverysecond[2].spendingattacksmored
4、ifficult.However,therehavebeenManyseethisdistributedcomputationasacolossalconcernsovertheefficiencyofthisproof-of-workpuzzle,wasteofCPUresources,andresearchershaveproposedandalternative“useful”proofshavebeenproposed.alternativecryptocurrencies,oraltcoins,
5、thataimtohaveInthispaper,wepresentDDoSCoin,whichisacryp-morebeneficialproofs-of-work[13,16]thatprovideutil-tocurrencywithamaliciousproof-of-work.DDoSCoinitybeyondsecuringtheunderlyingcurrency:findingallowsminerstoprovethattheyhavecontributedtoachainsoflar
6、geprimesorprovingthearchiveofdata.distributeddenialofserviceattackagainstspecifictar-Inthispaperhowever,weinvestigategoingintheoppo-getservers.Thisproofinvolvesmakingalargenumbersitedirection,andproposeanaltcointhathasamaliciousofTLSconnectionstoatargets
7、erver,andusingcrypto-proof-of-workthatisexternallydetrimental.graphicresponsestoprovethatalargenumberofcon-Inparticular,weproposeaproof-of-workthatallowsnectionshasbeenmade.Likeproof-of-workpuzzles,minerstoprovetheyhaveparticipatedinadistributedde-these
8、proofsareinexpensivetoverify,andcanbemadenialofservice,orDDoS,attackagainstaparticulartarget.arbitrarilydifficulttosolve.Minersareincentivizedtosendandreceivelargeamountsofnetworktraffictoandfromthetargetinordertopro-1Introductiond
