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A digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. A valid digital signature on a message gives a recipient confidence that the message came from a sender known to the recipient. [1] [2]
The EU recognizes three different eIDAS-compliant implementations of advanced electronic signatures through digital signatures: PAdES, XAdES and CAdES. [7] An electronic signature can carry legal effect and be used as evidence in legal proceedings. A qualified electronic signature shall have the equivalent legal effect of a handwritten signature.
Common values include digital signature validation, key encipherment, and certificate signing. Extended Key Usage: The applications in which the certificate may be used. Common values include TLS server authentication, email protection, and code signing. Public Key: A public key belonging to the certificate subject.
PAdES, PDF Advanced Electronic Signatures is a set of restrictions and extensions to PDF and ISO 32000-1 making it suitable for Advanced Electronic Signatures. CAdES, CMS Advanced Electronic Signatures is a set of extensions to Cryptographic Message Syntax (CMS) signed data, making it suitable for Advanced Electronic Signatures.
The authors are members of the Section's Information Security Committee. The document was the first overview of principles and a framework for the use of digital signatures and authentication in electronic commerce from a legal viewpoint, including technologies such as certificate authorities and public key infrastructure (PKI).
PDF files may be digitally signed, to provide secure authentication; complete details on implementing digital signatures in PDF are provided in ISO 32000-2. PDF files may also contain embedded DRM restrictions that provide further controls that limit copying, editing, or printing. These restrictions depend on the reader software to obey them ...