I have an encrypted raw data file generated by an application. This file is used in a second application to generate a readable text file based on the raw data.I need to change a few values in the raw data file, but since the contents of the raw data file are encrypted, I wanted to find out what is the encryption mechanism that is being used on the file, so I can decrypt it, make some changes, and encrypt it back.A sample of the file can be found here: http://pastebin.com/Cuj8aTG1Since I could not infer, based on the contents of the file, what kind of encryption is used, I wanted to know if there is a good debugger for windows that I can use to try and go through the code of the application, and see if I can check how the decryption is made.Since I do not know if the debugger will depend on the language used, it does not use .net, that would be more easy to reverse engineer.Thank you for your help.
Debug an application for analyzing file decryption
encryption;decryption;cryptography
I wanted to know if there is a good debugger for windows that I can  useOllyDbg v2 is a good debugger for Windows.