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Background

机译：背景

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摘要

Encryption is the process of converting plaintext into ciphertext using a key. The ciphertext is only readable to key holders who can decrypt the data. Decryption translates ciphertext back to plaintext. Cryptography has become deeply interwoven in numerous facets of modern computer operations. It is "used to perform or support several basic security services: confidentiality, integrity authentication, source authentication, authorization and non-repudiation." Ancient Roman ciphers were simple and limited to written alpha-numeric characters, but modern cryptographic functions performed by computers can translate any data that can be expressed in computer code, i.e., binary (l's and 0's), into unreadable ciphertext. In simple terms, encryption and decryption is the process of a computer conducting a highly complex math problem — a problem so complex that it could not be done even using computer speed, processing, and memory capacity without the key.
机译：加密明文转换的过程成密文使用一个密钥。只有可读密钥持有者谁能解密数据。明文。现代计算机的交织在许多方面操作。一些基本的安全服务:机密性、完整性验证、身份验证源,授权和不可抵赖性的条件。”密码是简单的和有限的字母数字字符,但现代加密功能由计算机完成可以翻译任何数据,可以用吗计算机代码,即二进制(l和0)无法读懂的密文。加密和解密的过程计算机进行高度复杂的数学问题——问题这么复杂,它是不可能做到的即使使用计算机速度、处理和记忆没有能力的关键。

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