之前，我能够找到我的Outbrain流量来自哪里，因为它们包含了一个URL参数＆＃34; origSrc = 1534129 ＆＃34; （这是FoxNews.com）在这样的推荐人中：
http://paid.outbrain.com/network/redir?key=ba8d39805de79b21e0a2fcffd446bcb9&rdid=821633827&type=RPM_/NA_ch2&in-site=false&idx=0&pc_id=21501924&req_id=5b740ff295227c1753749adc72bbb725&agent=blog_JS_rec&recMode=7&reqType=1&wid=150&adsCats=1708,-1,-1&refPub=296&scp=false&reqIdx=2&fcapElementId=22824&origSrc=1534129&did=714910702&pv_id=78d716e32bec0124bcb424aa2eddaabf&uuid=2c2af39f-d968-4e88-8e88-ab230fcd7b33
他们最近编码了他们的URL，现在看起来像这样（取自FoxNews上的模块）：
http://paid.outbrain.com/network/redir?p=feJ7Nr753ZKUyzw%2BkQlkGkqo5h6KSzmqBURelKOHYrNFhpUzeNFwXTxpvZ9lBtLT%2FgisNu6dS9DPr4g73pQz4w9YK0W5LSzfsnlqPupuJb3Mcq4pJ7X9LIlPVyzR4QOTRGDIeznBTsTvVl9vPhOW9QJOZPzmQpAK7Q5yMiMwwXaPwzL78WZrc%2BC0bpWCIRwHsJSjqcMVcK%2FN6d8scrmnCAPlDwQVXudXKBRynneq02%2FD9Uqx%2F5zL501Asq0%2BTukd4UBkYdAS21EOSP7AkBn2dJl1G5HXtdURXZst%2F%2F%2B0TcQkRoZ98%2BO8qxKH87AX0uw5a2svIsbL9AmGnX3%2BlLVuMYZFTZRt0LbUnFUWuXFSkvT0oDfO93yhU5Kfcw%2BgpclDQe7NSaHu2ylLobiHuldabM%2B5DslhvZRSG7a4KZkYj%2BRAerkozmIuzDhbydgWPItX3pFDtt0e0tgwZ7Gen%2FT2lmA0qr1%2BLLs%2FPwx098SSR58%3D&v=2
http://paid.outbrain.com/network/redir?p=309deACtZtKjR3dLT6Bj9O0z08jGMvbDzb%2Fd8oIFnvZXEP7XkkjGe6ZhdKc0g2SYaXZfed7Xd9%2BGTy4%2B%2F%2BPxhWGXYoj5Acl9Vu7d3UPDnTZyzq9q%2BjzRXMMPnFezyYZ4swDqWJf1lRqOpBJhG%2Fmoge0OSSvdL2TdKpTvkf1Nj05z%2BL%2BthUPKVXZJ5cx%2BpSeUDsi4SfKr1VkY8hd6HWmspnwghK6KDuKwUjtzesbzYmp%2Bh9keRCCKUwciJ6LU2R17Wnj6BVm7onAsV4INFNPI2Q9lOb%2B%2FX4QRvPxlQXiV5anx9%2BEz%2B1rGtDUdN%2Fy9wYn%2FdUggxWvYNeEbkP2c3fBhnOFEbonbMjPKILpuJB6736QDoyoMuA1ajf4ol%2FbcIhr4p0JXnqd3NPgiQY1%2Fr69z5tiNucv5FkU9v0ndUP%2FyN4FLg2dzo2GxednAZemvGtveCwXbIYGaCAEuWRUvleHgjWKBq5oD0c4cXvTrF%2BiYvmg%3D&v=2
http://paid.outbrain.com/network/redir?p=MYWXGHfkM0sqd18Ui%2BFev3GftAAm1Kb6pMI5j7F0ajSSxG9%2F9iYBjIOsnuqKi9vYijInoR1WxEhljCj8x13h0DIq7tN2dbhbJ9XnZUatWQgEifNWdRSD8ctvH2Y7CLvFnn8jLVovdJLyEVhAgbbOp55WiaEBPfKySR6pMUSPxlViQKLqGvpWRihGnl0STT1dpZqXSdYPixEg69pYB1Ug25u%2BQWrqZh9nI2mQe%2FfClHU6RO8DjiJfBLybujkSCa3aZcB9BeQPgsD6ZF824ymK%2FuyhF7TbR4XUsj7VzM06UjHxwOf4yyG%2FKnRja%2Bn7TOctwZlQJS4NM1Hcd9VEUOjZXVstFrUL6eIxw7nyVSfEkHxOr%2FRZFbbuigxQTei%2BhOExXozKbdfVjZlM8DyQEC0vSOk65NZoZH6sqDdS82Kzq3tCo7StJfv7vJqX9M3jHCizFu8H7IrLZ8%2FI3DhNYDWWY5hv1ECQXjrBdBDJvdQmP8c%3D&v=2
http://paid.outbrain.com/network/redir?p=6iwOm%2B%2BX4zGj74w0QWgyt4ix6H27RiHYp1gQ4qWa3mx90Q2MqZOZTjjiwepqeJpnA9aSwVgJpr9hB0Cy5CM9bBxCVmS%2FGOLl%2BtEc%2B567MNWivjSXAU2KTbV39EqwhOTfCcQAvqtShB%2BM2GtsUyxT63Wt16Q%2B1pMOH17JscejlYAcOjz%2BIkZDQXsKQi3%2FG%2FBzQDTl1suimn3DA63sE230KwmoZPLrgQuSaQENsq9bmcOFHq%2BOGqMLFg9AUKFeXyObjktfdmvPvBCCXH3zNZcYxMAv%2FHCHNGBEzvDHo58h4%2BG15ME%2FriHgPoVbZAVGzpKGspCwPJ8FKOHCjEw%2BZ7PDL%2BeO%2F3MYpqNH5VWVhYna2Tv0zIHrWpRtFSrxqM%2B73DR7gGOogNF32zayMdqHPbUOR2AAkOaW2gLZIn6Z%2F%2F8yh7ms77fgxdeQr8N0IaLOkxhE93UiK9dP216xOaUc64AKcPm7s2qGlW7b3QyG33CBmzY%3D&v=2
这四个网址中的某个地方是一个将网站标识为FoxNews.com或origSrc id的参数。
有谁知道如何找出新网址中origSrc的内容？
答案 0 :(得分：5)
网站 paid.outbrain.com 按照点击链接的次数获得付款。绝对符合他们的最佳利益，使得无法确定链接的原始源是什么，而无需实际单击它，从而从其服务器获取重定向。如果他们已经正确地完成了他们的工作，那么就不应该有办法确定URL中参数中编码的数据实际包含的内容，当然也不是原始来源（没有花费大量的时间，金钱和更多的数据）。他们希望人们不得不点击链接，无法解码链接并绕过记录点击。
但是，我们可以做一些分析，看看是什么。有助于进行此类分析的一件事是，还有已知不包含所需信息的链接。
传递了两个参数：p和v。 v=2每个都相同;有一个值似乎包含非常有限的信息，可能只是向服务器指示它是一个新的样式链接。它可以被忽略。
考虑到p参数的长度，可能存在编码的数据。另一种实现方式是让他们只将索引发送到存储在其服务器上的数据。这将阻止接收链接的人获得关于链接可能是什么的任何信息。然而，他们似乎没有这样做。
链接的p参数为：
feJ7Nr753ZKUyzw%2BkQlkGkqo5h6KSzmqBURelKOHYrNFhpUzeNFwXTxpvZ9lBtLT%2FgisNu6dS9DPr4g73pQz4w9YK0W5LSzfsnlqPupuJb3Mcq4pJ7X9LIlPVyzR4QOTRGDIeznBTsTvVl9vPhOW9QJOZPzmQpAK7Q5yMiMwwXaPwzL78WZrc%2BC0bpWCIRwHsJSjqcMVcK%2FN6d8scrmnCAPlDwQVXudXKBRynneq02%2FD9Uqx%2F5zL501Asq0%2BTukd4UBkYdAS21EOSP7AkBn2dJl1G5HXtdURXZst%2F%2F%2B0TcQkRoZ98%2BO8qxKH87AX0uw5a2svIsbL9AmGnX3%2BlLVuMYZFTZRt0LbUnFUWuXFSkvT0oDfO93yhU5Kfcw%2BgpclDQe7NSaHu2ylLobiHuldabM%2B5DslhvZRSG7a4KZkYj%2BRAerkozmIuzDhbydgWPItX3pFDtt0e0tgwZ7Gen%2FT2lmA0qr1%2BLLs%2FPwx098SSR58%3D
309deACtZtKjR3dLT6Bj9O0z08jGMvbDzb%2Fd8oIFnvZXEP7XkkjGe6ZhdKc0g2SYaXZfed7Xd9%2BGTy4%2B%2F%2BPxhWGXYoj5Acl9Vu7d3UPDnTZyzq9q%2BjzRXMMPnFezyYZ4swDqWJf1lRqOpBJhG%2Fmoge0OSSvdL2TdKpTvkf1Nj05z%2BL%2BthUPKVXZJ5cx%2BpSeUDsi4SfKr1VkY8hd6HWmspnwghK6KDuKwUjtzesbzYmp%2Bh9keRCCKUwciJ6LU2R17Wnj6BVm7onAsV4INFNPI2Q9lOb%2B%2FX4QRvPxlQXiV5anx9%2BEz%2B1rGtDUdN%2Fy9wYn%2FdUggxWvYNeEbkP2c3fBhnOFEbonbMjPKILpuJB6736QDoyoMuA1ajf4ol%2FbcIhr4p0JXnqd3NPgiQY1%2Fr69z5tiNucv5FkU9v0ndUP%2FyN4FLg2dzo2GxednAZemvGtveCwXbIYGaCAEuWRUvleHgjWKBq5oD0c4cXvTrF%2BiYvmg%3D
MYWXGHfkM0sqd18Ui%2BFev3GftAAm1Kb6pMI5j7F0ajSSxG9%2F9iYBjIOsnuqKi9vYijInoR1WxEhljCj8x13h0DIq7tN2dbhbJ9XnZUatWQgEifNWdRSD8ctvH2Y7CLvFnn8jLVovdJLyEVhAgbbOp55WiaEBPfKySR6pMUSPxlViQKLqGvpWRihGnl0STT1dpZqXSdYPixEg69pYB1Ug25u%2BQWrqZh9nI2mQe%2FfClHU6RO8DjiJfBLybujkSCa3aZcB9BeQPgsD6ZF824ymK%2FuyhF7TbR4XUsj7VzM06UjHxwOf4yyG%2FKnRja%2Bn7TOctwZlQJS4NM1Hcd9VEUOjZXVstFrUL6eIxw7nyVSfEkHxOr%2FRZFbbuigxQTei%2BhOExXozKbdfVjZlM8DyQEC0vSOk65NZoZH6sqDdS82Kzq3tCo7StJfv7vJqX9M3jHCizFu8H7IrLZ8%2FI3DhNYDWWY5hv1ECQXjrBdBDJvdQmP8c%3D
6iwOm%2B%2BX4zGj74w0QWgyt4ix6H27RiHYp1gQ4qWa3mx90Q2MqZOZTjjiwepqeJpnA9aSwVgJpr9hB0Cy5CM9bBxCVmS%2FGOLl%2BtEc%2B567MNWivjSXAU2KTbV39EqwhOTfCcQAvqtShB%2BM2GtsUyxT63Wt16Q%2B1pMOH17JscejlYAcOjz%2BIkZDQXsKQi3%2FG%2FBzQDTl1suimn3DA63sE230KwmoZPLrgQuSaQENsq9bmcOFHq%2BOGqMLFg9AUKFeXyObjktfdmvPvBCCXH3zNZcYxMAv%2FHCHNGBEzvDHo58h4%2BG15ME%2FriHgPoVbZAVGzpKGspCwPJ8FKOHCjEw%2BZ7PDL%2BeO%2F3MYpqNH5VWVhYna2Tv0zIHrWpRtFSrxqM%2B73DR7gGOogNF32zayMdqHPbUOR2AAkOaW2gLZIn6Z%2F%2F8yh7ms77fgxdeQr8N0IaLOkxhE93UiK9dP216xOaUc64AKcPm7s2qGlW7b3QyG33CBmzY%3D
立即跳出的是%个字符。我们可以假设%表示分离一个字段。为了简单分析，我们对那些在不同链接上相同的字段感兴趣，因此我们计算出现次数：
Count Field
4 %3D
4 %2F
3 %2B
1 feJ7Nr753ZKUyzw
1 MYWXGHfkM0sqd18Ui
1 6iwOm
1 309deACtZtKjR3dLT6Bj9O0z08jGMvbDzb
1 %2FyN4FLg2dzo2GxednAZemvGtveCwXbIYGaCAEuWRUvleHgjWKBq5oD0c4cXvTrF
1 %2Fy9wYn
1 %2FuyhF7TbR4XUsj7VzM06UjHxwOf4yyG
1 %2FriHgPoVbZAVGzpKGspCwPJ8FKOHCjEw
1 %2Fr69z5tiNucv5FkU9v0ndUP
1 %2Fmoge0OSSvdL2TdKpTvkf1Nj05z
1 %2FgisNu6dS9DPr4g73pQz4w9YK0W5LSzfsnlqPupuJb3Mcq4pJ7X9LIlPVyzR4QOTRGDIeznBTsTvVl9vPhOW9QJOZPzmQpAK7Q5yMiMwwXaPwzL78WZrc
1 %2FfClHU6RO8DjiJfBLybujkSCa3aZcB9BeQPgsD6ZF824ymK
1 %2FdUggxWvYNeEbkP2c3fBhnOFEbonbMjPKILpuJB6736QDoyoMuA1ajf4ol
1 %2Fd8oIFnvZXEP7XkkjGe6ZhdKc0g2SYaXZfed7Xd9
1 %2FbcIhr4p0JXnqd3NPgiQY1
1 %2FX4QRvPxlQXiV5anx9
1 %2FT2lmA0qr1
1 %2FRZFbbuigxQTei
1 %2FPwx098SSR58
1 %2FN6d8scrmnCAPlDwQVXudXKBRynneq02
1 %2FKnRja
1 %2FI3DhNYDWWY5hv1ECQXjrBdBDJvdQmP8c
1 %2FHCHNGBEzvDHo58h4
1 %2FGOLl
1 %2FG
1 %2FD9Uqx
1 %2FBzQDTl1suimn3DA63sE230KwmoZPLrgQuSaQENsq9bmcOFHq
1 %2F9iYBjIOsnuqKi9vYijInoR1WxEhljCj8x13h0DIq7tN2dbhbJ9XnZUatWQgEifNWdRSD8ctvH2Y7CLvFnn8jLVovdJLyEVhAgbbOp55WiaEBPfKySR6pMUSPxlViQKLqGvpWRihGnl0STT1dpZqXSdYPixEg69pYB1Ug25u
1 %2F8yh7ms77fgxdeQr8N0IaLOkxhE93UiK9dP216xOaUc64AKcPm7s2qGlW7b3QyG33CBmzY
1 %2F5zL501Asq0
1 %2F3MYpqNH5VWVhYna2Tv0zIHrWpRtFSrxqM
1 %2BthUPKVXZJ5cx
1 %2BtEc
1 %2BpSeUDsi4SfKr1VkY8hd6HWmspnwghK6KDuKwUjtzesbzYmp
1 %2Bn7TOctwZlQJS4NM1Hcd9VEUOjZXVstFrUL6eIxw7nyVSfEkHxOr
1 %2BlLVuMYZFTZRt0LbUnFUWuXFSkvT0oDfO93yhU5Kfcw
1 %2BkQlkGkqo5h6KSzmqBURelKOHYrNFhpUzeNFwXTxpvZ9lBtLT
1 %2BjzRXMMPnFezyYZ4swDqWJf1lRqOpBJhG
1 %2BiYvmg
1 %2BhOExXozKbdfVjZlM8DyQEC0vSOk65NZoZH6sqDdS82Kzq3tCo7StJfv7vJqX9M3jHCizFu8H7IrLZ8
1 %2Bh9keRCCKUwciJ6LU2R17Wnj6BVm7onAsV4INFNPI2Q9lOb
1 %2BgpclDQe7NSaHu2ylLobiHuldabM
1 %2BeO
1 %2BZ7PDL
1 %2BX4zGj74w0QWgyt4ix6H27RiHYp1gQ4qWa3mx90Q2MqZOZTjjiwepqeJpnA9aSwVgJpr9hB0Cy5CM9bBxCVmS
1 %2BTukd4UBkYdAS21EOSP7AkBn2dJl1G5HXtdURXZst
1 %2BRAerkozmIuzDhbydgWPItX3pFDtt0e0tgwZ7Gen
1 %2BQWrqZh9nI2mQe
1 %2BPxhWGXYoj5Acl9Vu7d3UPDnTZyzq9q
1 %2BOGqMLFg9AUKFeXyObjktfdmvPvBCCXH3zNZcYxMAv
1 %2BO8qxKH87AX0uw5a2svIsbL9AmGnX3
1 %2BM2GtsUyxT63Wt16Q
1 %2BLLs
1 %2BL
1 %2BIkZDQXsKQi3
1 %2BGTy4
1 %2BG15ME
1 %2BFev3GftAAm1Kb6pMI5j7F0ajSSxG9
1 %2BEz
1 %2BC0bpWCIRwHsJSjqcMVcK
1 %2B73DR7gGOogNF32zayMdqHPbUOR2AAkOaW2gLZIn6Z
1 %2B5DslhvZRSG7a4KZkYj
1 %2B567MNWivjSXAU2KTbV39EqwhOTfCcQAvqtShB
1 %2B1rGtDUdN
1 %2B1pMOH17JscejlYAcOjz
1 %2B0TcQkRoZ98
我们发现没有重复的％字段。由此，我们可以得出结论：%字符是字段分隔符的假设是错误的，没有包含重复数据的字段，或者编码数据的方法在每个URL中都不会产生相同的输出对于任何相同的单个字段。这种情况有多种方式。可以很容易地在字符串中编码种子值。这样的种子值可能只是一个实际解码密钥列表的索引，它只存在于服务器上。
因此，假设％标记字段被抛出，因为它没有证明存在任何重复字段，我们会查看它以查看它可能是什么。
上面的输出清楚地表明只有3个不同的格式为％[0-9A-F] [0-9A-F]的字符串。我们知道，为了通过URL传输数据，需要以完全相同的格式编码许多字符。转换％2F = /，％2B = +使用的代码，当然还有评论中提到的％3D = =。我们看到：
feJ7Nr753ZKUyzw+kQlkGkqo5h6KSzmqBURelKOHYrNFhpUzeNFwXTxpvZ9lBtLT/gisNu6dS9DPr4g73pQz4w9YK0W5LSzfsnlqPupuJb3Mcq4pJ7X9LIlPVyzR4QOTRGDIeznBTsTvVl9vPhOW9QJOZPzmQpAK7Q5yMiMwwXaPwzL78WZrc+C0bpWCIRwHsJSjqcMVcK/N6d8scrmnCAPlDwQVXudXKBRynneq02/D9Uqx/5zL501Asq0+Tukd4UBkYdAS21EOSP7AkBn2dJl1G5HXtdURXZst//+0TcQkRoZ98+O8qxKH87AX0uw5a2svIsbL9AmGnX3+lLVuMYZFTZRt0LbUnFUWuXFSkvT0oDfO93yhU5Kfcw+gpclDQe7NSaHu2ylLobiHuldabM+5DslhvZRSG7a4KZkYj+RAerkozmIuzDhbydgWPItX3pFDtt0e0tgwZ7Gen/T2lmA0qr1+LLs/Pwx098SSR58=
309deACtZtKjR3dLT6Bj9O0z08jGMvbDzb/d8oIFnvZXEP7XkkjGe6ZhdKc0g2SYaXZfed7Xd9+GTy4+/+PxhWGXYoj5Acl9Vu7d3UPDnTZyzq9q+jzRXMMPnFezyYZ4swDqWJf1lRqOpBJhG/moge0OSSvdL2TdKpTvkf1Nj05z+L+thUPKVXZJ5cx+pSeUDsi4SfKr1VkY8hd6HWmspnwghK6KDuKwUjtzesbzYmp+h9keRCCKUwciJ6LU2R17Wnj6BVm7onAsV4INFNPI2Q9lOb+/X4QRvPxlQXiV5anx9+Ez+1rGtDUdN/y9wYn/dUggxWvYNeEbkP2c3fBhnOFEbonbMjPKILpuJB6736QDoyoMuA1ajf4ol/bcIhr4p0JXnqd3NPgiQY1/r69z5tiNucv5FkU9v0ndUP/yN4FLg2dzo2GxednAZemvGtveCwXbIYGaCAEuWRUvleHgjWKBq5oD0c4cXvTrF+iYvmg=
MYWXGHfkM0sqd18Ui+Fev3GftAAm1Kb6pMI5j7F0ajSSxG9/9iYBjIOsnuqKi9vYijInoR1WxEhljCj8x13h0DIq7tN2dbhbJ9XnZUatWQgEifNWdRSD8ctvH2Y7CLvFnn8jLVovdJLyEVhAgbbOp55WiaEBPfKySR6pMUSPxlViQKLqGvpWRihGnl0STT1dpZqXSdYPixEg69pYB1Ug25u+QWrqZh9nI2mQe/fClHU6RO8DjiJfBLybujkSCa3aZcB9BeQPgsD6ZF824ymK/uyhF7TbR4XUsj7VzM06UjHxwOf4yyG/KnRja+n7TOctwZlQJS4NM1Hcd9VEUOjZXVstFrUL6eIxw7nyVSfEkHxOr/RZFbbuigxQTei+hOExXozKbdfVjZlM8DyQEC0vSOk65NZoZH6sqDdS82Kzq3tCo7StJfv7vJqX9M3jHCizFu8H7IrLZ8/I3DhNYDWWY5hv1ECQXjrBdBDJvdQmP8c=
6iwOm++X4zGj74w0QWgyt4ix6H27RiHYp1gQ4qWa3mx90Q2MqZOZTjjiwepqeJpnA9aSwVgJpr9hB0Cy5CM9bBxCVmS/GOLl+tEc+567MNWivjSXAU2KTbV39EqwhOTfCcQAvqtShB+M2GtsUyxT63Wt16Q+1pMOH17JscejlYAcOjz+IkZDQXsKQi3/G/BzQDTl1suimn3DA63sE230KwmoZPLrgQuSaQENsq9bmcOFHq+OGqMLFg9AUKFeXyObjktfdmvPvBCCXH3zNZcYxMAv/HCHNGBEzvDHo58h4+G15ME/riHgPoVbZAVGzpKGspCwPJ8FKOHCjEw+Z7PDL+eO/3MYpqNH5VWVhYna2Tv0zIHrWpRtFSrxqM+73DR7gGOogNF32zayMdqHPbUOR2AAkOaW2gLZIn6Z//8yh7ms77fgxdeQr8N0IaLOkxhE93UiK9dP216xOaUc64AKcPm7s2qGlW7b3QyG33CBmzY=
由此我们认识到它们可以使用base64进行编码。事实上，它们都解码为368字节的数据。二进制文件通常分为固定长度的字段。如果数据包含一个简单的数字地图，表明它指向一个特定的网站，我们希望在所有四个368字节长的序列中找到一个区域，这个区域在所有四个中都是相同的。因此，我们打破了多文件数据比较器。它产生：
0x000 7d df 31 ea 1 multi-diff
0x001 e2 4f 85 2c O multi-diff
0x002 7b 5d 97 0e ] multi-diff
0x003 36 78 18 9b 6 x multi-diff
0x004 be 00 77 ef w multi-diff
0x005 f9 ad e4 97 multi-diff
0x006 dd 66 33 e3 f 3 multi-diff
0x007 92 d2 4b 31 K 1 multi-diff
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从这里我们看到数据中没有字节位置匹配所有四个数据，假设它是base64编码的，这很可能。因此，看起来所需信息不是在固定长度和位置的二进制字段中编码的。
基本上，我们可以通过快速而肮脏的方式得出结论，或者假设他们正确地完成了他们的工作，并使用一种编码来阻止我们解码，而不会在他们的服务器上保存数据。
即使解码时需要服务器上的数据，也可以确定该信息。然而，这样做的技术通常需要获得大量编码消息，以便最终重复用于编码的数据值。由此可以确定解码消息所需的未知数据。
我有很多未涉及的内容。破解编码/加密领域是巨大的，并且投入了大量资金。这里的内容只是非常简单查看数据。
大多数加密的目的是使原始数据的成本（时间，精力，CPU，资金）比原始数据的价值更高。似乎 paid.outbrain.com 已成功使用通过该栏的编码/加密。