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尹学渊版的DES第二版,注释写得非常清楚,并且执行效率不错,代码质量相比第一版有很大的改进,尹学渊保留所有权利,转载自:http://www.cnblogs.com/erwin/-The second edition of YinXueyuan s DES code,the Notes is very clear, and good performance, code quality compared to a significant improvement over the first edition, All rights reserved.YinXueyuan, reprinted from: http://www.cnblogs.com/ erwin /