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密码技术是信息安全的核心技术。如今,计算机网络环境下信息的保密性、完整性、可用性和抗抵赖性,都需要采用密码技术来解决。密码体制大体分为对称密码(又称为私钥密码)和非对称密码(又称为公钥密码)两种。公钥密码在信息安全中担负起密钥协商、数字签名、消息认证等重要角色,已成为最核心的密码。又有一些新的密码算法不断的出现,在不同的信息领域扮演着重要的角色。
Cryptography is the core technology of information security. Today, the confidentiality, integrity, availability and non-repudiation of information in a computer network environment require the use of cryptographic techniques. The password system is roughly divided into two kinds of symmetric password (also known as private key password) and asymmetric password (also known as public key password). Public key password in information security to assume key agreement, digital signatures, message authentication and other important roles, has become the core of the password. There are a number of new cryptographic algorithms that continue to emerge and play an important role in different fields of information.