gHacks Technology News | Latest Tech News, Software And Tutorials » md5 checker

DVDsig Generates, Verifies MD5 Signatures

Martin Brinkmann — Wed, 14 Jul 2010 16:20:07 +0000

The portable 10K tool DVDsig has been created to quickly generate and verify the MD5 signatures of a base folder and all files it contains. MD5 hashes are used to verify a file’s integrity by comparing the initial value to the current value, differences indicate that the file has been changed in the meantime. This method is more reliable than comparing file modification dates or file sizes.

The portable software needs to be placed in the base directory. It can for instance be placed in a download folder or the root folder of a disk compilation.

The main interface displays a Scan and Verify link. Scan will initiate the scan of all files that reside in the base folder and its subfolders. MD5 hashes are generated and stored in a database file in the same folder.

dvdsig

The program displays status information in its interface, usually if a file is not accessible or other problems related to generating the MD5 values. All MD5 hashes are stored in a file named dvdsig.md5.

DVDsig will automatically recognize that file and refuse to run the scan again if it exists. Selecting the Verify option instead will process all files in the folder a second time and compare the hashes to the ones stored in the database file.

The output lists the total files, files that were identical, bad files and missing files. Bad and missing files are displayed with their file name in the interface so that it is possible to react on the file change right away.

DVDsig has been primarily designed by the developer as a file verification software for DVD-ROM and CD-ROM media, but it can be used for other verification purposes as well. Its small size makes it an ideal program to be included on removable media or optical media.

Verify the integrity and authenticity of files

Martin Brinkmann — Mon, 24 Dec 2007 19:00:29 +0000

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.

The hash has to be the same, if it is not either the download went wrong or someone tampered with the file in some way. This could be that a virus or trojan was added to it for instance.

HashTab is a Windows Shell extension that adds a File Hashes tab to the properties window when right-clicking a file. It does display the hashes of several algorithms including MD5 or CRC32 and even has a button to easily compare hashes. That’s better than manually trying to compare the 32 digit+ hashes.

Check MD5 Hashes

Clazirus — Sat, 21 Apr 2007 19:29:52 +0000

MD5 (Message-Digest algorithm 5) can be used as a way of checking that a computer file has not been maliciously or accidentally altered. To put it simple, it works like a fingerprint. So, nowadays most of websites includes this information to their software, which looks like this:

Using MD5 checker, we can ensure the integrity of the files. All you need is to copy those published MD5 hashes to clipboard and launch this application. Paste it, and then simply click the browse button to locate the file. The md5 hashes will be compared to the one on the clipboard. The result then will be shown if the file was altered or not.

You could also create hashes for your file.