electronic record was altered the digital signature would be invalidated, then such digital signature shall be deemed to be a secure digital signature . I5. The Minister shall for the purposes of this Act prescribe the security procedure having regard to commercial circumstances prevailing at the time when the procedure is used, including — (a) the nature of the transaction; (b) the level of sophistication of the parties with reference to their technological capacity; (c) the volume of similar transactions engaged in by other parties; (d) the availability of alternatives offered to but rejected by any party; (e) the cost of alternative procedures; and (f) the procedures in general use for similar types of transactions or communications. Part VI - Regulation of Certifying Authorities 16.(1) The Minister may, by notification in the Official Gazette, appoint a Controller of certifying Authorities for the purposes of this Act and such number of Deputy Controllers and Assistant Controllers as the Minister deems fit. (2) The Controller shall discharge the functions of the Controller under this Act subject to the general control and directions of the Minister. (3) The Deputy Controller and Assistant Controllers shall perform the functions assigned to them by the Controller under the general superintendence and control of the Controller. 17. The Controller may perform all or any of the following functions, namely— (a) exercising supervision over the activities of the Certifying Authorities; (b) laying down the standards to be maintained by the Certifying Authorities; (c) specifying the qualifications and experience which employees of the Certifying Authorities should possess; (d) specifying the conditions subject to which the Certifying Authorities shall conduct their business; (e) specifying the content of written, printed or visual material and advertisements that may be distributed or used in respect of a Digital Signature Certificate and the Public Key; (f) specifying the form and content of a Digital Signature Certificate and the public key; (g) Specifying the form and manner in which accounts shall be maintained by the Certifying Authorities; 7