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The Cryptographic Message Syntax (CMS) is the IETF's standard for cryptographically protected messages. It can be used by cryptographic schemes and protocols to digitally sign , digest , authenticate or encrypt any form of digital data.
CMS is a general framework for electronic signatures for various kinds of transactions like purchase requisition, contracts or invoices. [2] CAdES specifies precise profiles of CMS signed data making it compliant with the European eIDAS regulation (Regulation on electronic identification and trust services for electronic transactions in the internal market).
In cryptography, PKCS #7 ("PKCS #7: Cryptographic Message Syntax", "CMS") is a standard syntax for storing signed and/or encrypted data. PKCS #7 is one of the family of standards called Public-Key Cryptography Standards ( PKCS ) created by RSA Laboratories .
For an electronic signature to be considered as advanced it must meet several requirements: [3] [4] The signatory can be uniquely identified and linked to the signature; The signatory must have sole control of the signature creation data (typically a private key) that was used to create the electronic signature
The Digital Signature Algorithm (DSA) is a public-key cryptosystem and Federal Information Processing Standard for digital signatures, based on the mathematical concept of modular exponentiation and the discrete logarithm problem.
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Due to the wide range of requirements from the various application areas of signatures and time-stamps, the core specification has been extended by a series of so-called “profiles”, e.g. for use with code signing, entity seals or processing XAdES- and CAdES-compliant artifacts. In the following years further profiles were developed, e.g ...