Since Martin constantly manages to cover all ongoing news regarding cryptography and security I myself planned on writing about “any time soon”, I had to look for other topics on the subject I could cover. So I decided to make good use of all the time I spend studying this kind of stuff and share this knowledge with you. And I would be very grateful, if someone could tell me in return how to defeat shirred fabrics with my sewing machine… but that’s a whole different matter.

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Many download websites and developers display a so called MD5 hash code of the application that you want to download on their website which can be used to verify the integrity and authenticity of it. This can be done by comparing the MD5 hash code of the downloaded file with the one on the homepage where you did download it from.

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Most people think it takes lots of work to encrypt files. The freeware click crypt 2.6 allows to encrypt and decrypt files with just one click. It´s unfortunatly only available in german but that does not matter a lot because the interface is simple and easy. Click on Download Sofort ausführbares Setup which starts the download. After that install the software on your system and start it. This opens a configuration window which is named Verschlüsslungsmethoden. You select the encryption algorithm that you want to use, you have three options, those are: MD2 (128bit), MD5 (128bit) and SHA (160 bit).

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