The Interplanetary Overlay Network (ION) is NASA's open-source software implementation of Delay Tolerant Networking (DTN). ION development is managed by the Jet Propulsion Laboratory.

Bundle Protocol Security Library (BSL)

ACME DTN Node ID Validation Extension

BP Secure Advertisement and Neighborhood Discovery (SAND)

Bundle Protocol (BP) Manifest Block

Bundle Protocol Security Associations with Few Exchanges (SAFE)

End-to-end encrypted offline P2P emergency messaging for Android. BLE mesh. No internet required. HPKE + Ed25519. BPv7. Rust core + Kotlin.