For sections 15 and 16 of the principal Act, the following sections shall be substituted, namely:--
15. Secure electronic signature.- An electronic signature shall be deemed to be a secure electronic signature if--
(i) the signature creation data, at the time of affixing signature, was under the exclusive control of signatory and no other person; and
(ii) the signature creation data was stored and affixed in such exclusive manner as may be prescribed.
Explanation.--In case of digital signature, the "signature creation data" means the private key of the subscriber.
16. Security procedures and practices.- The Central Government may, for the purposes of sections 14 and 15, prescribe the security procedures and practices:
Provided that in prescribing such security procedures and practices, the Central Government shall have regard to the commercial circumstances, nature of transactions and such other related factors as it may consider appropriate.'.