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List of Abbreviations

CACertification Authority
CRLCertificate Revocation List
CSRCertificate Signing Request
DMZDemilitarized Zone
FRFoundational Requirement
HTTPSHypertext Transfer Protocol Secure
ICSIndustrial Control System
ISMSInformation Security Management System
ITInformation Technology
NATNetwork Address Translation
OTOperational Technology
PATPort and Address Translation
PKIPublic Key Infrastructure
PSKPre-shared Key
SRSystem Requirements
TLSTransport Layer Security
VPNVirtual Private Network