ETSI TS 119 122-1规定了CAdES数字签名。CAdES签名基于CMS签名[7]，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ASN。1.上述属性的定义及其在以下情况下的用法: 将其纳入凯德的签名。本文件规定了CAdES基线签名的格式，该格式提供了 电子程序和通信的广泛商业和政府用例适用于 当电子商务中使用的数字签名明确需要互操作性时，广泛的社区 文件。本文件定义了四个级别的CAdES基线签名，以满足 长期保持签名的有效性，某种程度上始终解决所有问题 在低于它的级别上解决需求。每一个级别都需要具备一定的CADE属性 为了尽可能减少可选性而进行了分析。

ETSI TS 119 122-1 specifies CAdES digital signatures. CAdES signatures are built on CMS signatures [7], 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 the ASN.1 definitions for the aforementioned attributes as well as their usage when incorporating them to CAdES signatures.The present document specifies formats for CAdES baseline signatures, which provide the basic features necessary for a wide range of business and governmental use cases for electronic procedures and communications to be applicable to a wide range of communities when there is a clear need for interoperability of digital signatures used in electronic documents.The present document defines four levels of CAdES baseline signatures 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. Each level requires the presence of certain CAdES attributes, suitably profiled for reducing the optionality as much as possible.