ETSI TS 119 122-2规定了CAdES数字签名。CAdES签名基于CMS签名[i.8]，由 合并有符号和无符号属性，满足某些通用要求（如长期 例如，数字签名在许多用例中的有效性。本文件规定了CAdES的若干签名级别，以满足维护的增量需求 签名的长期有效性，某种程度上始终满足所有要求 以低于它的级别进行处理。这些CADE比CADE具有更高的可选性 ETSI TS 119 122-1[1]中规定的基线签名。本文件旨在支持不同监管框架下的数字签名。

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.