AES (Advanced Electronic Signature)
Definition
Frequently asked questions
What does AES mean in the context of electronic signature?
AES stands for Advanced Electronic Signature, that is to say advanced electronic signature as defined by Article 26 of the eIDAS regulation. It is the intermediate level between simple signature and qualified signature. It is distinguished by a unique link with the signatory, their identification, and the detection of any modification of the document after signature.
What does it have to do with AES encryption?
None, except for the acronym. The Advanced Encryption Standard is a symmetric encryption algorithm, standardized in 2001, which serves to make data unreadable without the key. It protects confidentiality. Advanced electronic signature, on the other hand, proves the identity of the signatory and the integrity of the document. The two can coexist in the same service without being confused.
Is advanced signature sufficient for an employment contract or a lease?
In the vast majority of cases, yes. No law imposes the qualified level for these contracts, and the advanced level provides what is missing from simple signature: verified identity and a document whose any alteration is detectable. This is why it has become the reference level for binding everyday contracts.
How to recognize an advanced signature?
By three indicators. The signatory has been identified by a means that is unique to them, for example a single-use code received on their phone. The signed document bears an electronic certificate. Finally, opening the file in a PDF reader indicates whether the content has been modified since signing. A proof file traces the entire process.
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