Electronic Communications and Transactions [ N o . 21 o f 2 0 0 9 " data controller "" m e a n s any person, either alone or in common with other persons, who controls and is responsible for keeping and using of personal information on a computer, or in structured manual files, and electronically requests, collects, collates, processes or stores personal information from or in respect of a data subject; data interference " means the corruption, damaging, deletion, deterioration, alteration or suppression of computer data without authority; " data message " means data generated, sent, received or stored by electronic means and includes— (a) a voice, where the voice is used in an automated transaction; and (b) a stored record; " data subject " means any natural person from, or in respect of w h o m , p e r s o n a l information h a s been r e q u e s t e d , c o l l e c t e d , c o l l a t e d , p r o c e s s e d or s t o r e d , after t h e c o m m e n c e m e n t of this Act; " decryption " means the electronic transformation of data or communication that has been encrypted; " delayed access message service " m e a n s a method by w h i c h a c o m m u n i c a t i o n intended for a person can be submitted using a communications system, without the person being in direct contact with anyone submitting the communication and can be subsequently accessed by the person, whether or not other persons are able to access it; " denial of service attacks " means rendering a computer s y s t e m i n c a p a b l e o f p r o v i d i n g n o r m a l services to its legitimate users; " device " m e a n s an apparatus which can be used to intercept a wire, oral or electronic communication other t h a n — (a) a telephone or telegraph instrument, equipment or facility, or any component thereof, furnished to the subscriber or user by a provider of wire or electronic communication service in the ordinary course of business a n d — (i) used by the subscriber or user in the ordinary course of business or furnished by such subscriber or user for connection to the facilities of such service and used in the ordinary course o f business; or 229