SignShell - Secure Terminal

SignShell lets you connect to shared terminal sessions from your Android device with end-to-end encryption and Solana wallet authentication.

Whether you're monitoring a remote server, pair programming, or reviewing a colleague's terminal session SignShell gives you secure, real time access from anywhere.

How it works

A host shares their terminal using the SignShell CLI. You open the app, paste the share link, and you're connected. All terminal data is encrypted before it leaves the host's machine the server only routes encrypted bytes. It cannot read your commands or terminal output.

End-to-End Encryption

SignShell uses AES-128-GCM encryption for all terminal data. Three encryption keys protect every session:

An output key encrypts data from the host to you
An input key encrypts your commands back to the host
A bootstrap key securely exchanges the above two keys
The encryption key is embedded in the share link fragment (#) — a part of the URL that never reaches the server. Your data stays private, even from the server operator.

Keys are automatically rotated after 1,048,576 messages to maintain cryptographic integrity.

Solana Wallet Authentication

Sessions can require cryptographic identity verification using your Solana wallet (Phantom or Solflare). No passwords, no accounts just sign the session terms with your wallet to prove your identity.

Your private key never leaves your wallet app. SignShell only receives your public key and message signature.

No SOL balance or tokens are required. The wallet is used solely for digital signatures.

Features

Real-time terminal streaming with auto-scroll
Read-only or read-write access (set by host)
Share link auto-parsing paste a link and connect instantly
Secure WebSocket communication
AES-128-GCM end-to-end encryption
Solana wallet authentication via Phantom or Solflare
Automatic key rotation
Session terms review before connecting
Works with any SignShell server
No account registration required
Who is this for?

Developers sharing terminal sessions with teammates
DevOps engineers monitoring remote servers on the go
Security professionals who need encrypted terminal access
Teams doing live code reviews or pair programming
Anyone who needs to view a shared terminal from mobile
Privacy & Security

All terminal data is encrypted end-to-end
The server never sees your commands or terminal output
No personal data is collected
No analytics or tracking
Wallet private keys never leave your wallet app
Open source encryption implementation
Requirements

Android 8.0 or later
Phantom or Solflare wallet app (only if session requires authentication)
A share link or terminal ID from the host