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🛡️ CipherGist - End-to-End Encrypted Messaging via GitHub Gists

CipherGist is a lightweight, secure, and open-source encrypted messenger that enables private communication using GitHub Gists as the backend. It leverages NaCl (libsodium) for state-of-the-art encryption, ensuring that only the intended recipient can decrypt your messages. No centralized servers, no metadata tracking—just pure encrypted messaging.

✨ Features

✅ End-to-End Encryption – Uses Ed25519 (signing) and X25519 (encryption) for secure communication.
✅ No Central Server – Messages are stored and exchanged via GitHub Gists.
✅ Self-Destructing Keys – Private keys are never shared or stored remotely.
✅ Lightweight & Fast – Runs in a terminal, with minimal dependencies.
✅ Cross-Platform – Works on Windows, Android(Termux), macOS, and Linux.
✅ Fully Open-Source – Code transparency ensures security.

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🔥 What Makes CipherGist Unique?

🔹 Unlike traditional messengers (WhatsApp, Signal), CipherGist does not use a central server.
🔹 No phone number, email, or identity required—just a GitHub account.
🔹 Messages are not stored permanently—once deleted from Gist, they are gone forever.
🔹 No third-party tracking—GitHub itself can't read your encrypted messages.

📊 CipherGist vs Other Messengers – Feature Comparison

Feature	CipherGist 🛡️	Signal 🔵	Telegram ✈️	WhatsApp ✅	Email (PGP) 📧
End-to-End Encryption	✅ Yes (NaCl - X25519)	✅ Yes (Signal Protocol)	⚠️ Secret Chats Only	✅ Yes	✅ Yes (PGP)
Requires Phone Number	❌ No	✅ Yes	✅ Yes	✅ Yes	❌ No
Server Storage	❌ None (Uses GitHub Gist)	✅ Yes (Signal servers)	✅ Yes (Cloud-based)	✅ Yes (Meta servers)	❌ No
Metadata Collection	❌ No (Only encrypted text in Gist)	⚠️ Some (Stores who you contact)	⚠️ High (Cloud sync)	🚨 Very High (Metadata & backups)	❌ No
Self-Hosted Option	✅ Yes (Your own Gist)	❌ No	❌ No	❌ No	✅ Yes (Own mail server)
Message Deletion	✅ Fully Controllable (Delete Gist)	✅ Yes (Disappearing messages)	✅ Yes	✅ Yes	✅ Yes
Group Chat Support	❌ Not yet	✅ Yes	✅ Yes	✅ Yes	❌ No
Multi-Device Support	✅ Yes (Cross-platform)	✅ Yes	✅ Yes	✅ Yes	✅ Yes
Third-Party Tracking	❌ None	❌ No	✅ Yes (Cloud storage)	✅ Yes (Meta tracking)	❌ No
Dependencies	🔹 Python, GitHub Gist	🔹 Signal App	🔹 Telegram App	🔹 WhatsApp App	🔹 PGP Tools
Message Delivery	🔄 Polls Gist every 3 sec	📩 Push Notifications	📩 Push Notifications	📩 Push Notifications	📩 Email
Open-Source	✅ Yes	✅ Yes	⚠️ Partially	❌ No	✅ Yes
Data Ownership	✅ You own your messages	❌ No	❌ No	❌ No	✅ Yes
Best Use Case	🔐 Anonymous Secure Chat	🔵 Private Messaging	🔹 Casual & Cloud Backup	✅ Friends & Family	📧 Email Security

🚀 Conclusion:
CipherGist is the most private and self-hosted option, ideal for those who want no central servers, no phone numbers, and full control over encryption keys. However, it's not as user-friendly as mainstream messengers and currently lacks group chat features.

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🛠️ Installation & Setup

1️⃣ Installation

git clone https://github.com/spyboy-productions/CipherGist.git

cd CipherGist

pip install -r requirements.txt

2️⃣ Create a GitHub Account

Go to GitHub and create an account if you don’t have one.

3️⃣ Get a GitHub Token

1. Visit: GitHub Developer Settings
2. Click "Generate new token" (classic)
3. Select "Gist" with read, write, delete permission
4. Copy and save your GitHub Token (you won’t see it again!)

4️⃣ Create a Gist

1. Go to: GitHub Gists
2. Click "New Gist"
3. Name it chat.txt (keep it public or secret)
4. Click "Create gist"
5. Copy the Gist ID (last part of the URL)

5️⃣ Run CipherGist

python CipherGist.py

If it’s your first time running, it will ask for:
🔹 GitHub Token
🔹 Gist ID

These will be stored in config.txt for future use.

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⚠️ IMPORTANT:
**Both you and your friend must use the same config.txt ** for the conversation to work!

You can manually share config.txt with your friends or You can share it using the following method...

To share config.txt

python send.py

- 🔐 Note: It encrypts config.txt, uploads it to a Gist, and automatically deletes it after your friend downloads and decrypts it.

To Receive config.txt

python receiver.py

it will download, decrypt and save config.txt in original format and then delete the gist.

🔑 How to Use

python CipherGist.py

📤 Sending a Message:

1. Type your message and hit Enter.
2. The message gets encrypted and stored in your Gist.
3. Your friend with the same config.txt can decrypt it.

📥 Receiving Messages:

1. The program checks your Gist every 3 seconds.
2. If a new encrypted message is found, it automatically decrypts and displays it.

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🔐 Is CipherGist Secure?

✔ Uses NaCl cryptography (Ed25519 & X25519) – trusted by security experts.
✔ No passwords stored – keys are generated per session.
✔ No central server – GitHub can't read your encrypted messages.
✔ No metadata leaks – only encrypted text is uploaded to Gists.
✔ Self-hosted & auditable – you control the encryption keys.

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📝 Future Plans

🚀 Mobile App – A mobile version for Android/iOS.

🔒 Multi-User Chat Support – Secure group conversations.

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🎯 Start Encrypting Today!

Forget about centralized messengers. Take control of your privacy with CipherGist.

If you find this GitHub repo useful, please consider giving it a star! ⭐️