Practical Attacks on Digital Signatures Using MD5

We use the knowledge of the single MD5 collision published by Wang et al. to show an example of a pair of binary self-extract packages with equal MD5 checksums, whereas resulting extracted contracts have fundamentally different meaning. Secondly, we demonstrate how an attacker could create custom pair of such packages containing files arbitrarily chosen by the attacker with equal MD5 sums where each of the package extracts different file. Once the algorithm for finding MD5 collisions is published, attack could be made even more effective as we explain further. Authors of [2] claim to know such algorithm for any MD5 initialization vector. A real-world scenario of such attack is outlined. Finally, we point out the consequences resulting from such attack for signature schemes based on MD5 message digest on an example using GPG.
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How to send data between pages using GET method

It is well-known how to use POST method in C#. I mean Server.Transfer method. But some times it is better to send some variables between pages using GET method. Here is the example of doing so.

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Convert Java to EXE

"How do I make an .EXE file from my Java application?", "Need help converting jar to exe", "Is it possible to create a Windows executable using Java?" --- these and similar questions are among the most popular topics on Java developer forums. Should you start such a topic today, you are likely to encounter the following three types of replies:

• "You cannot"
• "You should not, because that would kill the very purpose of Java"
• "You can do that with third party software X and Y"

The truth is that there exist two completely different approaches to the creation of native executables from Java applications, addressing different sets of problems. Moreover, under certain conditions some of those problems may be solved without making an EXE. So the most correct way to reply to such a post would be a request for more information, namely what is the goal of conversion to EXE. And the most frequent answer would be

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Mixing of GROUP columns (MIN(),MAX(),COUNT()...) with no GROUP columns is illegal if there is no GROUP BY clause

Solutions for: Mixing of GROUP columns (MIN(),MAX(),COUNT()...) with no GROUP columns is illegal if there is no GROUP BY clause Error Code: 1140 Error Info: no information yet

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