monkeysphere
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Description:
Use the OpenPGP web of trust to verify ssh connections
Type: Formula  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  formulae.brew.sh
Category: Security
Tags: ssh pgp encryption security authentication openpgp
Install: brew install monkeysphere
About:
Monkeysphere is a set of tools that leverages the OpenPGP web of trust to authenticate SSH connections. It allows users to validate SSH host keys and user IDs using PGP signatures, providing a decentralized alternative to traditional certificate authorities. This enables trust establishment without relying on a central server.
Key Features:
  • Validates SSH host keys using PGP signatures
  • Provides tools for PGP-based SSH authentication (pem2openpgp, ssh2openpgp)
  • Integrates with existing OpenPGP keyrings and infrastructure
  • Decentralized trust model based on the web of trust
Use Cases:
  • Establishing trust for SSH servers without centralized CAs
  • Authenticating SSH connections in environments with existing PGP infrastructure
  • Verifying server identity using the OpenPGP web of trust
Alternatives:
  • SSH Certificate Authorities (CA) – Monkeysphere uses the decentralized PGP web of trust instead of a centralized SSH CA.
  • TLS/SSL – Monkeysphere applies PGP trust to SSH, whereas TLS uses X.509 certificates and CAs.
Version History
Detected Version Rev Change Commit
Dec 29, 2025 3:55pm 10 REVISION_ONLY 50124bab
Sep 16, 2025 12:09am 9 VERSION_BUMP d0bd95ab
Nov 25, 2024 9:00am 9 VERSION_BUMP ffbc9508
Oct 22, 2024 11:22am 9 VERSION_BUMP 6ed4d966
Oct 22, 2024 4:36am 9 VERSION_BUMP bddcc88c
Sep 14, 2024 8:40am 8 VERSION_BUMP e075714c