Section 3 Authentication of electronic records
(1) Subject to the provisions of this section any subscriber may authenticate an electronic recordDefined in section 2(t): electronic record means data, record or data generated, image or sound stored, received or sent in an electronic form or micro film or computer generated micro fiche; 3[(ta) electronic signature means authentication of any electronic record by a subscriber by means of the electronic technique specified in the Second... by affixing his digital signatureDefined in section 2(p): digital signature means authentication of any electronic record by a subscriber by means of an electronic method or procedure in accordance with the provisions of section 3.
(2) The authentication of the electronic recordDefined in section 2(t): electronic record means data, record or data generated, image or sound stored, received or sent in an electronic form or micro film or computer generated micro fiche; 3[(ta) electronic signature means authentication of any electronic record by a subscriber by means of the electronic technique specified in the Second... shall be effected by the use of asymmetric crypto systemDefined in section 2(f): asymmetric crypto system means a system of a secure key pair consisting of a private key for creating a digital signature and a public key to verify the digital signature and hash functionDefined in section 2(u): function, in relation to a computer, includes logic, control, arithmetical process, deletion, storage and retrieval and communication or telecommunication from or within a computer; 3[(ua) Indian Computer Emergency Response Team means an agency established under sub section (1) of Section 70B;] which envelop and transform the initial electronic recordDefined in section 2(t): electronic record means data, record or data generated, image or sound stored, received or sent in an electronic form or micro film or computer generated micro fiche; 3[(ta) electronic signature means authentication of any electronic record by a subscriber by means of the electronic technique specified in the Second... into another electronic recordDefined in section 2(t): electronic record means data, record or data generated, image or sound stored, received or sent in an electronic form or micro film or computer generated micro fiche; 3[(ta) electronic signature means authentication of any electronic record by a subscriber by means of the electronic technique specified in the Second....
Explanation.—For the purposes of this sub-section, "hash functionDefined in section 2(u): function, in relation to a computer, includes logic, control, arithmetical process, deletion, storage and retrieval and communication or telecommunication from or within a computer; 3[(ua) Indian Computer Emergency Response Team means an agency established under sub section (1) of Section 70B;]" means an algorithm mapping or translation of one sequence of bits into another, generally smaller, set known as "hash result" such that an electronic recordDefined in section 2(t): electronic record means data, record or data generated, image or sound stored, received or sent in an electronic form or micro film or computer generated micro fiche; 3[(ta) electronic signature means authentication of any electronic record by a subscriber by means of the electronic technique specified in the Second... yields the same hash result every time the algorithm is executed with the same electronic recordDefined in section 2(t): electronic record means data, record or data generated, image or sound stored, received or sent in an electronic form or micro film or computer generated micro fiche; 3[(ta) electronic signature means authentication of any electronic record by a subscriber by means of the electronic technique specified in the Second... as its input making it computationally infeasible—
(a) to derive or reconstruct the original electronic recordDefined in section 2(t): electronic record means data, record or data generated, image or sound stored, received or sent in an electronic form or micro film or computer generated micro fiche; 3[(ta) electronic signature means authentication of any electronic record by a subscriber by means of the electronic technique specified in the Second... from the hash result produced by the algorithm;
(b) that two electronic records can produce the same hash result using the algorithm.
(3) Any person by the use of a public key of the subscriber can verify the electronic recordDefined in section 2(t): electronic record means data, record or data generated, image or sound stored, received or sent in an electronic form or micro film or computer generated micro fiche; 3[(ta) electronic signature means authentication of any electronic record by a subscriber by means of the electronic technique specified in the Second....
(4) The private key and the public key are unique to the subscriber and constitute a functioning key pairDefined in section 2(x): key pair, in an asymmetric crypto system, means a private key and its mathematically related public key, which are so related that the public key can verify a digital signature created by the private key.