ShredMaster - Secure File Shredder

A powerful, user-friendly desktop application for securely deleting files beyond recovery. ShredMaster overwrites your files multiple times with different patterns before deletion, making data recovery virtually impossible.

Features

• Multiple Shredding Algorithms

  • Simple (1-pass): Quick single overwrite with zeros
  • DoD 5220.22-M (3-pass): US Department of Defense standard
  • Gutmann (35-pass): Maximum security with 35 overwrite passes
  • Custom: Define your own patterns and number of passes

• Secure Operations

  • Multi-threaded processing for faster shredding
  • Secure file renaming before deletion
  • Dry run mode to preview operations
  • Real-time progress tracking

Installation

Prerequisites

• Python 3.7 or higher
• tkinter (usually included with Python)

Setup

1. Clone the repository:

git clone https://github.com/cranbru/Shredmaster.git
cd shredmaster

2. Run the application:

python main.py

Usage

1. Launch the application

   python main.py

2. Add files to shred

   • Click "Add" to select individual files
   • Click "Browse Dir" to add all files from a directory
   • Remove unwanted files with "Remove" or "Clear"

3. Configure shredding options

   • Select an algorithm (Simple, DoD, Gutmann, or Custom)
   • Enable "Dry Run" to test without actually deleting files
   • Enable "Secure Rename" to randomize filenames before deletion
   • Adjust thread count for performance (1-32 threads)
   • For Custom mode, specify patterns (e.g., "00,FF,RANDOM") and passes

4. Start shredding

   • Click "Start Shred" to begin
   • Monitor progress in the progress bar and logs
   • Click "Cancel" to stop the operation

Shredding Algorithms

Simple (1-pass)

Overwrites files once with zeros. Fast but less secure.

DoD 5220.22-M (3-pass)

US Department of Defense standard:

• Pass 1: Zeros (0x00)
• Pass 2: Ones (0xFF)
• Pass 3: Random data

Gutmann (35-pass)

Maximum security method with 35 different patterns. Extremely thorough but slower.

Custom

Define your own shredding pattern:

• Specify hex patterns (e.g., "00", "FF") or "RANDOM"
• Set the number of passes
• Example: "00,FF,RANDOM" with 5 passes

Configuration

Settings are automatically saved to settings.json and persist between sessions. You can manually edit this file to set defaults.

Example settings.json:

{
    "algorithm": "DoD",
    "dry_run": false,
    "secure_rename": true,
    "threads": 4,
    "custom_pattern": "00,FF,RANDOM",
    "custom_passes": 3,
    "log_file": "",
    "mode": "file"
}

Security Notes

Important Warnings:

• Irreversible: Shredded files cannot be recovered. Use with caution.
• SSD Limitations: Modern SSDs with wear-leveling may not fully overwrite data. For maximum security on SSDs, use full-disk encryption.
• Backups: Shredding doesn't affect backups or cloud copies of files.
• Test First: Always use "Dry Run" mode first to verify you're shredding the correct files.