A Qualified Electronic Signature (QES) is a digital signature that meets certain legal requirements and is recognized as legally valid and trustworthy under the applicable laws.
A QES is based on a crypto key that is uniquely assigned to the signatory and enables them to sign electronic documents in a legally binding manner. To be considered qualified, the signature must meet certain criteria, such as using a secure signature creation system, guaranteeing the authenticity of the signature and ensuring the integrity of the signed document .
QES is often used in various business and legal contexts to ensure the authenticity of electronic documents and transactions and to guarantee the legal validity of contracts and agreements.