ACRONYMS    AES  Advanced  Encryption  Standard  AGA  American  Gas  Association  AHWG06  Ad  hoc  working  group  06  ASDU  Application-­‐layer  Service  Data  Unit  ANSI  American  National  Standards  Institute  API  American  Petroleum  Institute  CIGRE  International  Council  on  Large  Energy  Systems  CIP  Critical  Infrastructure  Protection  CISSWG  Critical  Infrastructure  Security  Standards  Working  Group  CMIP  Common  Management  Information  Protocol  COBIT  Control  Objectives  for  Information  and  Related  Technology  DCS  Distributed  Control  Systems  DHS  United  States  Department  of  Homeland  Security  DNP  Distributed  Network  Protocol  DOE  United  States  Department  of  Energy  DoS  Denial-­‐of-­‐Service  DSS  Digital  Signature  Standard  FERC  Federal  Energy  Regulatory  Commission  GOOSE  Generic  Object  Oriented  Substation  Event  GRI  Gas  Research  Institute  GSSE  Generic  Substation  Status  Event  GTI  Gas  Technology  Institute  HAP  Host  Access  Protocol  HMAC  Hashed  message  authentication  code  HV  High  Voltage  ICS  Industrial  Control  Systems  IEC  International  Electro  technical  Commission  IEEE  Institute  of  Electrical  and  Electronic  Engineers  IETF  Internet  Engineering  Task  Force  IGT  Institute  of  Gas  Technology  INEEL  Idaho  National  Engineering  and  Environmental  Laboratory  INGAA  Interstate  Natural  Gas  Association  of  America  INL  Idaho  National  Laboratory  ISA  Instrumentation,  Systems,  and  Automation  Society