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# KMS - Key Management System
Tendermint KMS (opens new window) is a key management service that allows separating key management from Tendermint nodes. In addition it provides other advantages such as:
- Improved security and risk management policies
- Unified API and support for various HSM (hardware security modules)
- Double signing protection (software or hardware based)
It is recommended that the KMS service runs in a separate physical hosts.
# Building
Detailed build instructions can be found here (opens new window).
When compiling the KMS, ensure you have enabled the applicable features:
Backend | Recommended Command line |
---|---|
YubiHSM | cargo build --features yubihsm |
Ledger+Tendermint App | cargo build --features ledgertm |
# Configuration
A KMS can be configured in various ways:
# Using a YubiHSM
Detailed information on how to setup a KMS with YubiHSM2 can be found here (opens new window)
# Using a Ledger device running the Tendermint app
Detailed information on how to setup a KMS with Ledger Tendermint App can be found here