Secure Drop

A secure version of airdrop

By: Jacob Glik, and Peyton Somerville

Prerequisites

Python Packages

• cryptography
  • pip install cryptography
  • python3 -m pip install cryptography
• stdiomask
  • pip install stdiomask
  • python3 -m pip install stdiomask
• tinyec
  • pip install tinyec
  • python3 -m pip install tinyec
• cffi
  • pip install cffi
  • python3 -m pip install cffi

Instructions

Type python3 secureDrop.py to run Secure Drop.

Type python3 reset.py to reset Secure Drop and erase all data.

Usage Note:

Secure Drop will work best on Windows. The functionality may be limited when running on other operating systems.

The size of files is limited to 2 GB when transferring between instances of Secure Drop.

Implements

Complete "end-to-end encryption"

1. Credit Authority validates clients and their asymmetric encryption keys
2. An ECDH Key Handshake is performed between the two parties before every message to ensure Perfect Forward Secrecy
3. All communication is symmetrically encrypted using the symmetric key generated from the ECDH Key Handshake step above
4. The file system is tamper-proof due to the FileCredibility system