ThenewversionofS7-200cn2.01edition,PLCnewaddedfourth levelprotection,thatis,prohibitreadingandwriting, regardlessofwhetheryouknowthepassword,youcannotupload PLCprogram.BreakingthisencryptedPLCdoeshavesome difficulty.Webreakthe4levelpasswordideais:weallknow thatSIEMENS'sprogramisdividedintoblocks,blocksofdata and...