Abstract:Due to its high reliability, low cost and high performance, cloud computing has become the core of the new generation of information technology revolution. In order to effectively promote the sustainable development of the Internet security architecture,it proposes a cloud computing digital signature technology, which combines cloud computing technology and digital signature technology. Firstly, the value of cloud computing technology in digital signature system is expounded. Secondly, the implementation model of cloud computing digital signature technology is analyzed, and the digital signature protocol of cloud computing is designed. Finally, an example analysis is carried out to apply cloud computing digital signature technology. Go to the business information transaction of the mobile business hall. The results show that all services can be completed online, which can greatly reduce the user"s workload, reduce the workload of the mobile business hall, and ensure the reliability, uniqueness, authenticity, security and non-repudiation of business information transactions. . Through the result analysis, it is concluded that the digital signature technology of cloud computing can guarantee the integrity and authenticity of the signature file, and can operate the signature file across platforms. The digital signature model can also use the Internet to conveniently access the cryptographic computing infrastructure.