Shantanu Sarkar
Shantanu Sarkar
A military-grade file encryption and decryption utility using AES-256-GCM with PBKDF2 key derivation — available as both a desktop GUI and a local web-based application.
Implements the gold standard of symmetric encryption — AES-256 in GCM mode, providing both confidentiality and data integrity verification.
Passwords are never used directly — PBKDF2 with a random salt derives the encryption key, making brute-force attacks computationally infeasible.
A standalone desktop application with a clean graphical interface — no command line needed. Drag, drop, encrypt, done.
A local Flask server version that runs in the browser — same security, friendlier interface for users comfortable with web apps.
Encrypts and decrypts any file type — documents, images, archives, code files — with no size limitation on the desktop version.
GCM authentication tags verify file integrity on decryption — if the file was tampered with, decryption fails safely.
The user picks any file they want to protect using the file picker or drag-and-drop interface.
User enters a password. PBKDF2 derives a 256-bit encryption key from the password using a random salt.
AES-256-GCM encrypts the file data using the derived key and a random nonce. An authentication tag is generated.
The encrypted file (containing salt + nonce + tag + ciphertext) is saved. The original is untouched.
User provides the correct password. Key is re-derived, integrity is verified, and the original file is restored.
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