One powerful file encryption and security tool for the Windows platform. As the successor of highly successful BFA97, Blowfish Advanced CS offers a bunch of new and improved features which are:

• Blowfish, Twofish, AES, RC4, TDES, Serpent, CAST
• Strong key support, handling and cryptography
• Fast: encrypts megabytes of data per second
• Data compression using LZSS, deflate and BZIP2
• Secure wiping of files and clearing of empty disk space
• Comfortable user interface with built-in file browser
• Easy working with encrypted files
• Complete integration into Windows Explorer
• Automation of daily routines by using job files
• Dozens of options to finetune the application
• Small: fits on half of the space of a floppy disk!
• Trustworthy: the complete source code is available
• Quick language switch (German and English)
• Runs on all Win32 versions, from 95 to Vista
• Personal Edition without any restrictions!

Check out the FAQ page, if you have further questions. You might want to read the change notes to get information about the latest features and fixes. Or just look at a screenshot.

If you want to give it a try, please download the installer:

Blowfish Advanced CS - Installer
(908 kB)

MD5: e1 40 82 3e ec 62 34 0f 1b 5f 3c b4 0e 63 ca 1f

For users who don't need or want an installer, who like to save some download time or who face problems with the regular installer here's the compact ZIP file version. Please follow the steps in README.TXT (or LIESMICH.TXT for German users):

Blowfish Advanced CS - Files Only
(614 kB)

MD5: 65 ed 16 da b0 96 4f 9b d8 6b 62 bd 5a 00 ab d9

The complete source code of Blowfish Advanced CS is available under the Apache 2.0 License. The application itself is written in Delphi and C/C++. Please check out the included BUILDING.TXT file for details about how to built, and LICENSE.TXT for the legal aspects.

Blowfish Advanced CS - Sourcecode
(1013 kB)

MD5: fb fb 6f 7e 5f 33 c8 60 42 e8 57 4f f3 72 22 99

Parlez-vous français? Si c'est le cas, vous pouvez obtenir le pack français ici. Merci beaucoup, Philippe!

Parli italiano? In questo caso, puoi scaricare
la versione italiana qui. Grazie, Marco!
(12 kB, MD5: fa 0e 52 97 69 7f 08 25 9d 27 96 a5 d3 8b 59 90)

¿Hablas Español? Si es así, pincha aqui para bajarte
la versión en Español. Gracias, Carlamen!
(72 kB, MD5: 3e 18 da 73 7a da ae 56 ab e4 bf 10 07 4b db d5)

Password Finder 2.01

Applying brute force attacks, this application can help you to recover your files encrypted with Blowfish Advanced CS, for which the password was lost - given that it was a relatively weak one or it can be partially guessed.

It also offers the possibility to write your own search routines in VB.NET and C# , compiling, testing and running it directly in Password Finder.

You need the Microsoft .NET Framework 1.1 or higher installed to run this program (available through Windows Update). Please check out the documentation in the Readme.html file. Freeware, all sources (written in VB.NET) included.

Download Password Finder
(49 kB)

MD5: ad 67 78 12 87 7b 51 76 a5 39 23 1c ed b4 a6 7c

This is a small Win32 application which is able to calculate the MD5 digest (some kind of a secure checksum) of the content of any file.

You can use this tool to ensure that the content of a file wasn't altered in any way. If e.g. someone tries to insert malicious code into an executable file its MD5 checksum will change and you note that something is wrong. Now with a complete HTML help system. Sourcecode included.

Download MD5 Checksum
(46 kB)

MD5: 2b 63 92 0c bb d2 85 26 02 f0 90 5d 0e 2c 72 e7

Bad Peggy is my latest Windows application. It searches for damaged JPEG files and will validate and verify pictures for truncation and other blemishes which sometimes occur when such files are getting downloaded or restored from bad backups.

It's quite useful for example to check if your precious photo library is still all intact (mine unexpectedly wasn't) and it's fast, comfortable to use and reliable in the analysis it does. Runs under Windows XP, 2000 and 98SE. Please notice that you might have to download the .NET Framework 2.0 if it hasn't been installed on your system so far.

Click here for the change log if you're running previous versions.

Download Bad Peggy
(327 kB)

MD5: 69 e5 28 34 e5 d9 fd 8f 16 bd 6b a3 9d 5f be 9d

This project has the goal to implement all (or at least the most significant) of the stream cipher candidates participating in the eSTREAM contest in Java as efficient as possible, especially regarding performance. For more information about the contest visit the official website.

The algorithms implemented as of today are AES/CTR, Dragon, Grain/Grain-128, HC-256, Hermes8, LEX, MICKEY, Phelix, RC4, Salsa20, Sosemanuk and Trivium. More will follow soon, stay tuned. The ZIP file contains all Java sources and an Eclipse project to build and test comfortably. To see the algorithms performing live please go to the performance lab.

Disclaimer: notice that estreamJ is not affiliated with eSTREAM, since they have their own testing framework written in C. Some algorithms might require a commercial license, please inform yourself independently if you intend to use them in your own application!

Download estreamJ
(87 kB)

MD5: d6 8c 46 e3 db 9d 29 98 0f 4b 4a 0b f2 14 34 c1

Below are my .NET and Java implementations of Phelix. They were written at a time when this algorithm was still a vital eSTREAM candidate. However it basically got broken and thus is not amongst the ciphers going for the 3rd and final round. If you are still interested in the code feel free to take a look at it (both packages are actually compatible to each other), yet usage for real world applications is definitely not recommended anymore...

Download PhelixJ 1.02
(14 kB)

MD5: 16 61 4f 2c 7a 23 3d 17 c5 a2 df e2 86 78 fd 05

Download Phelix.NET 0.24
(23 kB)

MD5: 7c d8 95 e1 e7 d6 27 46 7a b5 fa 6f a8 38 05 eb

Blowfish.NET 2.1.2

One of my latest projects and the approach to bring the Blowfish algorithm to the Microsoft .NET platform. This implementation covers ECB, CBC and CFB, is compatible to the official reference vectors and OpenSSL's Blowfish code. It also has been tuned for speed to the extreme.

The package includes a demo application to learn the basics and the BlowfishSimple class for ready-to-go string encryption. Interoperability classes for 100% compatible data exchange with the Java library BlowfishJ are part of this software. So are NUnit 2.4 test cases. And the BlowfishAlgorithm ties nicely into the .NET 2.0 security architecture. For verification the complete source code is included. The solution works with Visual Studio 2005 and Visual C# Express.

Download Blowfish.NET
(54 kB)

MD5: 16 3c df 9b 58 4d 3a 56 67 94 fb 54 1e ab 16 c1

BlowfishJ 2.40

The Blowfish implementation in Java. Provides extremly fast ECB, CBC and CFB encryption, which is also compatible to OpenSSL. Comes with the BlowfishEasy class for simple string encryption, plus a solution for streaming - both are interoperable with Blowfish.NET.

All sources, a deployable JAR file and coding demos are included. Javadocs can be generated via the Eclipse project file. Free to use in non-commerical applications.

Download BlowfishJ
(64 kB)

MD5: 3a ef 0a bc ea 0b 06 fc 49 71 f6 2c bb 28 ca 1d

Tiger.NET 1.02

This is a fast implementation of the Tiger Hash Algorithm by Eli Biham and Ross Anderson, released in 1996. It is a safe alternative (so far) to the other common hash functions like MD5 or the SHA family, which recently showed some weaknesses.

The code is written in Visual Basic.NET 2005 Express and implements the HashAlgorithm of the .NET 2.0 Framework, making it to be usable with standard classes like CryptoStream.

This package includes the sources and project files for the real world applications WinTiger and TigerSum, plus a demo and verification of the correct handling of the official test vectors. Free to use in other applications, please check the README.TXT for details.

Download Tiger.NET
(42 kB)

MD5: ca 96 4b 32 57 a4 e0 01 5b 9f c2 5b 31 7f ba 23

Or if just want the compiled applications, including a manual and ready to run without any installation necessary, then please

Download WinTiger and TigerSum
(50 kB)

MD5: 46 61 1f 1d a6 8a 21 8d eb ef 78 0e 06 f3 5b a6

Blowfish Advanced 7.01

The first of the gens BFA, published in 1996. This is the source code of the 7.01 release. You need Borland Pascal 7 and Turbo Assembler to compile this.

Download BFA7.01 Sourcecode
(277kB)

MD5: 6e 2a 66 bb 3f d3 3d b1 e4 0f ba e8 16 d4 c9 2a


If you want to see other sources of my old software then please let me know...