shenjunge.rar_C Builder 加密_神经网络加密_加密解密

<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8"> <meta name="generator" content="pdf2htmlEX"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <link rel="stylesheet" href="https://static.pudn.com/base/css/base.min.css"> <link rel="stylesheet" href="https://static.pudn.com/base/css/fancy.min.css"> <link rel="stylesheet" href="https://static.pudn.com/prod/directory_preview_static/639b4e1d8449b3069dd19c27/raw.css"> <script src="https://static.pudn.com/base/js/compatibility.min.js"></script> <script src="https://static.pudn.com/base/js/pdf2htmlEX.min.js"></script> <script> try{ pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({}); }catch(e){} </script> <title></title> </head> <body> <div id="sidebar" style="display: none"> <div id="outline"> </div> </div> <div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/639b4e1d8449b3069dd19c27/bg1.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x1 h3 y2 ff1 fs0 fc0 sc0 ls0 ws0">以神经网络为基础的</div><div class="t m0 x2 h3 y3 ff1 fs0 fc0 sc0 ls0 ws0">　　　　　　　　　一种数据序列加密方法</div><div class="t m0 x2 h4 y4 ff1 fs1 fc0 sc1 ls0 ws0">【摘要】：网络技术的发展带动社会的发展，网络安全技术成为发</div><div class="t m0 x2 h5 y5 ff1 fs2 fc0 sc1 ls0 ws0">展的主流，对于一些重要数据，就对其进行保密，这就涉及到一些加</div><div class="t m0 x2 h5 y6 ff1 fs2 fc0 sc1 ls0 ws0">密算法，目前存在的加密算法有很多，本文就针对以神经网络为基础</div><div class="t m0 x2 h5 y7 ff1 fs2 fc0 sc1 ls0 ws0">的一种数据序列加密方法进行剖析</div><div class="t m0 x2 h4 y8 ff1 fs1 fc0 sc1 ls0 ws0">【关键词】：神经网络　伪随机序列　密钥　密文　明文</div><div class="t m0 x2 h4 y9 ff1 fs1 fc0 sc1 ls0 ws0">【前言】：　</div><div class="t m0 x3 h5 ya ff1 fs2 fc0 sc1 ls0 ws0">　　随着网络技术的发展，网络安全技术发展的需要越来越重要，因</div><div class="t m0 x3 h5 yb ff1 fs2 fc0 sc1 ls0 ws0">此对一些重要数据，为了保证其安全性，我们需要对其进行加密．当</div><div class="t m0 x3 h5 yc ff1 fs2 fc0 sc1 ls0 ws0">前，数据加密的算法很多，而本文采用了序列加密算法对重要数据进</div><div class="t m0 x3 h5 yd ff1 fs2 fc0 sc1 ls0 ws0">行加密，一是因为序列加密算法的加密密钥与解密密钥相同，操作相</div><div class="t m0 x3 h5 ye ff1 fs2 fc0 sc1 ls0 ws0">对简单；二是序列加密算法是基于比特流或字符流的；三是序列加密</div><div class="t m0 x3 h5 yf ff1 fs2 fc0 sc1 ls0 ws0">算法的保密性取决于密钥序列的随机性．由于神经网络能根据不同的</div><div class="t m0 x3 h5 y10 ff1 fs2 fc0 sc1 ls0 ws0">训练情况，对输入空间与输出空间进行非线性的函数映射，因此，我</div><div class="t m0 x3 h5 y11 ff1 fs2 fc0 sc1 ls0 ws0">们可以用神经网络的方法作为密钥序列产生器来进行数据加密．</div><div class="t m0 x3 h4 y12 ff1 fs1 fc0 sc0 ls0 ws0">一．数据加密概述</div><div class="t m0 x3 h5 y13 ff1 fs2 fc0 sc1 ls0 ws0">１．数据加密原理</div><div class="t m0 x3 h5 y14 ff1 fs2 fc0 sc1 ls0 ws0">　　一般的数据加密模型如图１所示，在加密阶段，明文Ｘ用加密算</div><div class="t m0 x3 h5 y15 ff1 fs2 fc0 sc1 ls0 ws0">法和加密密钥 Ke 得到密文Ｙ＝E(X,Ke)．</div><div class="t m0 x2 h5 y16 ff1 fs2 fc0 sc1 ls0 ws0">　　在保密阶段，密文截取者有可能盗取密文，但由于没有解密密钥</div><div class="t m0 x3 h5 y17 ff2 fs2 fc0 sc1 ls0 ws0">Kd 而无法将其还原成明文，从而保证数据的安全性。</div></div><div class="t m0 x4 h6 y18 ff1 fs3 fc0 sc1 ls0 ws0">明文Ｘ</div><div class="c x0 y1 w2 h2"><div class="t m0 x5 h6 y19 ff1 fs3 fc0 sc1 ls0 ws0">　　截取者</div><div class="t m0 x6 h6 y1a ff1 fs3 fc0 sc1 ls0 ws0">解密密钥 Kd</div><div class="t m0 x7 h5 y1b ff1 fs2 fc0 sc1 ls0 ws0">解密密钥</div><div class="t m0 x8 h6 y1c ff1 fs3 fc0 sc1 ls0 ws0">　</div><div class="t m0 x8 h6 y1d ff1 fs3 fc0 sc1 ls0 ws0">　　　加密密钥 Ke</div><div class="t m0 x9 h6 y1e ff1 fs3 fc0 sc1 ls0 ws0">Ｅ</div><div class="t m0 xa h6 y1f ff1 fs3 fc0 sc1 ls0 ws0">加密算法</div><div class="t m0 xb h6 y1e ff1 fs3 fc0 sc1 ls0 ws0">Ｄ</div><div class="t m0 xc h6 y1f ff1 fs3 fc0 sc1 ls0 ws0">解密算法</div></div><div class="t m0 xd h6 y20 ff1 fs3 fc0 sc1 ls0 ws0">加密阶段 解密阶段</div><div class="t m0 xe h6 y21 ff1 fs3 fc0 sc1 ls0 ws0">密文 Y=E(Ke,,X)</div></div><div class="pi" data-data='{"ctm":[1.611850,0.000000,0.000000,1.611850,0.000000,0.000000]}'></div></div> </body> </html>

<div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/639b4e1d8449b3069dd19c27/bg2.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 xf h4 y22 ff1 fs1 fc0 sc0 ls0 ws0">２．数据加密技术分类</div><div class="t m0 xf h5 y23 ff1 fs2 fc0 sc1 ls0 ws0">数据加密技术可分为两类，即对称加密和非加称加密。对称加密的加密</div><div class="t m0 xf h5 y24 ff1 fs2 fc0 sc1 ls0 ws0">密钥和解密密钥不相同，加密密钥可以公开而解密密钥需要保密。在对</div><div class="t m0 xf h5 y25 ff1 fs2 fc0 sc1 ls0 ws0">称加密算法中，主要有序列密码法和分组密码加密法。</div><div class="t m0 xf h4 y26 ff1 fs1 fc0 sc1 ls0 ws0">３．序列加密算法</div><div class="t m0 x10 h5 y27 ff1 fs2 fc0 sc1 ls0 ws0">这种加密算法将明文Ｘ看成连续的比特流（或字符流）Ｘ 1，Ｘ 2.,</div><div class="t m0 x10 h7 y28 ff1 fs4 fc0 sc1 ls0 ws0">Ｘ 3</div><div class="t m0 x11 h5 y29 ff2 fs4 fc0 sc1 ls0 ws0">……,在加密过程中用密钥序列Ｋ=K1,K2……中的第 i 个元素,对明文中</div><div class="t m0 x11 h5 y2a ff1 fs2 fc0 sc1 ls0 ws0">的 xi 进行加密（图 2）</div><div class="t m0 x12 h5 y2b ff1 fs2 fc0 sc1 ls0 ws0">加密过程：yi=E(Ki,xi)=xi XOR ki</div><div class="t m0 x12 h5 y2c ff1 fs2 fc0 sc1 ls0 ws0">解密过程；D(Ki,yi)=(xi XOR ki) XOR Ki</div><div class="t m0 x12 h5 y2d ff1 fs2 fc0 sc1 ls0 ws0">从上述分析过程可得，序列密码加密算法的保密性取决于密钥的随</div><div class="t m0 x12 h5 y2e ff1 fs2 fc0 sc1 ls0 ws0">机性。如果密钥是真正的随机数，则在理论上是不可破的，但是这</div><div class="t m0 x12 h5 y2f ff1 fs2 fc0 sc1 ls0 ws0">种算法需要的密钥大得惊人，很难在实际中应用。</div><div class="t m0 x13 h4 y30 ff1 fs1 fc0 sc0 ls0 ws0">４.基于神经网络方法的序列加密算法模型</div><div class="t m0 x12 h5 y31 ff1 fs2 fc0 sc1 ls0 ws0">　　目前人们常用伪随机序列作为密钥，但是要求序列的周期要长，</div><div class="t m0 x14 h8 y32 ff3 fs2 fc0 sc1 ls0 ws0">Ki</div><div class="t m0 x15 h6 y33 ff1 fs3 fc0 sc1 ls0 ws0">解密</div><div class="t m0 x16 h8 y32 ff3 fs2 fc0 sc1 ls0 ws0">Ki</div><div class="t m0 xd h6 y33 ff1 fs3 fc0 sc1 ls0 ws0">加密</div><div class="t m0 x17 h8 y34 ff3 fs2 fc0 sc1 ls0 ws0">xiyi</div><div class="t m0 x18 h6 y35 ff1 fs3 fc0 sc1 ls0 ws0">密文序列</div><div class="t m0 x19 h9 y36 ff3 fs3 fc0 sc1 ls0 ws0">X1</div><div class="t m0 x1a h6 y35 ff1 fs3 fc0 sc1 ls0 ws0">明文序列</div><div class="t m0 x1a h6 y37 ff1 fs3 fc0 sc1 ls0 ws0">随机种子１</div><div class="t m0 x17 h6 y38 ff1 fs3 fc0 sc1 ls0 ws0">密文序列</div><div class="t m0 x15 h6 y37 ff1 fs3 fc0 sc1 ls0 ws0">密钥序列产生器密钥序列产生器</div><div class="t m0 x1b h8 y39 ff3 fs2 fc0 sc1 ls0 ws0">xor xor</div><div class="t m0 x1c h6 y37 ff1 fs3 fc0 sc1 ls0 ws0">随机种子１</div></div></div><div class="pi" data-data='{"ctm":[1.611850,0.000000,0.000000,1.611850,0.000000,0.000000]}'></div></div>