Blockchainadoptionhasextendedfromnicheresearchtoeverydayusage.However,despitetheblockchainrevolution,oneofthekeychallengesfacedinblockchaindevelopmentismaintainingsecurity,andthisbookwilldemonstratethetechniquesfordoingthis.You’llstartwithblockchainbasicsandexplorevariousblockchainattacksonuserwallets,anddenialofserviceandpoolminingattacks.Next,you’lllearncryptographyconcepts,consensusalgorithmsinblockchainsecurity,anddesignprincipleswhileunderstandinganddeployingsecurityimplementationguidelines.You’llnotonlycoverarchitecturalconsiderations,butalsoworkonsystemandnetworksecurityandoperationalconfigurationsforyourEthereumandHyperledgerFabricnetwork.You’lllaterimplementsecurityateachlevelofblockchainappdevelopment,understandinghowtosecurevariousphasesofablockchainappusinganexample-basedapproach.You’llgraduallylearntosecurelyimplementanddevelopdecentralizedapps,andfollowdeploymentbestpractices.Finally,you’llexplorethearchitecturalcomponentsofHyperledgerFabric,andhowtheycanbeconfiguredtobuildsecureprivateblockchainnetworks.Bytheendofthisbook,you’llhavelearnedblockchainsecurityconceptsandtechniquesthatyoucanimplementinrealblockchainproductionenvironments.