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ETSI TS 119 122-2 specifies CAdES digital signatures. CAdES signatures are built on CMS signatures [i.8], by incorporation of signed and unsigned attributes, which fulfil certain common requirements (such as the long term validity of digital signatures, for instance) in a number of use cases.

The present document specifies a number of CAdES signature levels addressing incremental requirements to maintain the validity of the signatures over the long term, in a way that a certain level always addresses all the requirements addressed at levels that are below it. These CAdES extended signatures a higher degree of optionality than the CAdES baseline signatures specified in ETSI TS 119 122-1 [1].

The present document aims at supporting digital signatures in different regulatory frameworks.