如何保证数据安全,是当前信息领域亟待解决的突出问题。作为数据安全的基础和核心,密码技术的发展及应用是推动信息化不断发展的重中之重。综合分析现代密码技术的发展,深入研究其在传统数据安全及云计算平台下的数据安全中所发挥的重大作用,为信息安全的持续发展奠定基础。 How to ensure data security is an outstanding issue to be solved urgently in the field of information. As the foundation and core of data security, the development and application of cryptography is the top priority for the continuous development of information technology. Based on a comprehensive analysis of the development of modern cryptography, it deeply studies its important role in data security under traditional data security and cloud computing platforms, laying the foundation for the sustainable development of information security.