Digital signature
A digital signature is the cryptographic method that technically secures electronic signatures: key pairs prove the authenticity and integrity of a document.
What is a digital signature?
A digital signature is a cryptographic method that proves the authenticity and integrity of a document. It is the technical basis of many electronic signatures.
How does a digital signature work?
The signer uses their private key to create a signature over a hash of the document. With the public key, anyone can verify that the document is authentic and unchanged.
Digital vs. electronic signature
Electronic signature is the legal umbrella term (eIDAS). Digital signature refers to the cryptographic method behind it. A QES, for example, uses a digital signature but is additionally defined in law.
How SecureCloud ensures integrity
SecureCloud relies on encryption and traceable logging, hosted in Germany. For legally compliant electronic signing, SecureSign is available and supports advanced (AES) and qualified (QES) electronic signatures under eIDAS.
Frequently asked questions
Is a digital signature the same as an electronic signature?
Not quite. Digital signature is the cryptographic method; electronic signature is the legal umbrella term that can use this method.
What does a digital signature protect?
It proves that a document is authentic and has not been changed after signing.
How is a digital signature verified?
Via the signer's public key, which verifies the signature and the document hash.
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