(b) Electronic Signature. An electronic signature is a digital authentication process attached to or logically associated with an electronic document and shall carry the same weight, authority, and effects as a manual signature. The electronic signature, which can be generated by using either public key infrastructure or signature dynamics technology, must be as follows.
(i) Unique to the person using it.
(ii) Capable of verification.
(iii) Under the sole control of the person using it.
(iv) Linked to a document in such a manner that the electronic signature is invalidated if any data in the document are changed.
