As the basis and core of information security, cryptography also attracts more and more attention. Brute force attack on symmetric cipher algorithms is an important direction of cryptography.

密码学作为信息安全的基础和核心，也越来越受到人们的关注，而暴力破解对称密码算法，是密码学研究的一个重要方向。

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In chapter 2, the basic algorithms and protocol of applied cryptography are introduced here, including symmetric-key cryptography, public-key cryptography, hash functions and key management protocols.

第二章介绍基本的应用密码学算法和密码协议，包括对称加密算法、非对称加密算法、散列函数、数字签名技术和密钥管理协议。

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This class can be flexibly used in VB to implement such cryptography algorithms as Symmetric Key, Public Key and Digital Signature.

使用该类可方便地在VB应用程序中实现对称密钥、公开密钥和数字签名算法，并且不受中英文编码方式的限制。

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