Algorithmic analysis of symmetric-key cryptographic primitives

密码学是使用数学技术保护信息的领域。计算机和通信技术的迅速崛起，特别是互联网的广泛使用，大大增加了对这类技术的需求。例如，每天进行数万亿美元的货币兑换，这些兑换必须以一种恶意各方无法查看或篡改它们的方式进行编码(即使它们是通过可公开访问的网络发送的)。对称密钥加密原语(如块密码、散列函数和流密码)是使此类交易能够安全高效地执行的基础设施的基本组件。

Cryptography is the field that uses mathematical techniques to secure information. The rapid rise of computer and communications technology, especially the widespread use of the Internet, has greatly increased the demand for such techniques. For example, trillions of dollars of currency exchanges are carried out each day, and these must be encoded in such a way that malicious parties cannot view or tamper with them (even if they are sent over publicly accessible networks). Symmetric-key cryptographic primitives such as block ciphers, hash functions, and stream ciphers are fundamental components of the infrastructure that enables such transactions to be carried out securely and efficiently.