5 "licensed certification authority" means a certification authority licensed by the Controller; “Minister” means the Minister to whom responsibility for the subject of Information Technology is assigned; "private key" means the key of a key pair used to create a digital signature; "public key" means the key of a key pair used to verify a digital signature; "public sector agency" includes any Ministry or Government Department, local authority or statutory body; "record" means information that is inscribed, stored or otherwise fixed on a tangible medium or that is stored in an electronic or other medium and is retrievable in perceivable form; "repository" means a system for storing and retrieving certificates or other information relevant to certificates; "security procedure" means a procedure for the purpose of — (a) verifying that an electronic record is that of a specific person; or (b) detecting error or alteration in the communication, content or storage of an electronic record since a specific point in time, which may require the use of algorithms or codes, identifying words or numbers, encryption, answerback or acknowledgment procedures, or similar security devices; "subscriber" means a person who is the subject named or identified in a certificate issued to him and who holds a private key that corresponds to a public key listed in that certificate; "transaction" means an action or set of actions relating to the conduct of business, commercial, or public sector activities and occurring between 2 or more persons; "trustworthy system" procedures that — (a) means computer hardware, are reasonably secure from intrusion or misuse; software, and