xmlns:atom="http://www.w3.org/2005/Atom" xmlns:atom="http://www.w3.org/2005/Atom"
An advanced electronic signature shall meet the following requirements:
it is uniquely linked to the signatory;
it is capable of identifying the signatory;
it is created using electronic signature creation data that the signatory can, with a high level of confidence, use under his sole control; and
it is linked to the data signed therewith in such a way that any subsequent change in the data is detectable.