138 No. 4 of 2021] Electronic Communications and Transactions “electronic signature” means— (a) sound; (b) symbol; (c) process; or (d) other data created or adopted by a person with the intent to sign a data message; “electronic transaction” means a transaction, action or set of transactions of a commercial or non-commercial nature, that takes place electronically; “hash function” means an algorithm mapping data of arbitrary size to fixed size values such that— (a) a record yields the same hash result every time the algorithm is executed using the same record as input; (b) it is computationally infeasible that a record can be derived or reconstituted from the hash result produced by the algorithm; and (c) it is computationally infeasible that two or more records can be found that produce the same hash result using the algorithm; “hosting” means the service of storage of data or providing storage of computing resources for one self or others; “information system” means a system for generating, sending, receiving, storing, displaying or otherwise processing a data message; “information system service” includes providing a connection, operating facilities for information systems, providing access to information systems, transmitting or routing of data messages between or among points specified by a user and the processing and storage of data, at the request of the recipient of the service; “key pair” in an asymmetric cryptosystem, means a private key and its mathematically related public key, having a property that allows the public key to verify a digital signature that the private key creates; “National Public Key Infrastructure” means a Government deployed public key infrastructure whose root certification authority is established as the highest level certification authority of Zambia and is managed by the National Root Certification Authority as a regulatory function;