RC4 is a stream cipher algorithm operating on each byte of data; like the RC2, it supports key lengths of 40 bits, 64 bits, and 128 bits.
RC 4是一个流密码算法，它对数据的每个字节进行操作；和RC 2一样，它支持长度为40位、64位和128位的密钥。
This research is helpful to the application of stream cipher algorithm in information security and modern secure communication equipment.
该研究结果有助于序列密码算法在信息安全及现代保密通信设备中的应用。
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