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Key Architecture

L1 Interaction Key

Understand the L1 Interaction Key - your standard Solana keypair for signing transactions, paying fees, and controlling public funds on the blockchain.

Overview

The L1 Interaction Key is a standard Ed25519 keypair-the same type of keypair used by any Solana wallet. It serves as your identity on the L1 blockchain and authorizes all on-chain transactions.

What It Does

This keypair enables you to:

  • Sign transactions on your behalf
  • Control funds in your wallet and associated accounts
  • Authorize operations for any program interactions, including Umbra

Security Implications

As with any blockchain keypair:

ScenarioConsequence
Key is lostYou permanently lose access to your funds
Key is compromisedAn attacker can drain your wallet and take control of your assets

There is no recovery mechanism. Whoever holds the private key has full control.

Best Practices

  • Backup securely - store your seed phrase or private key in a safe location
  • Use hardware wallets for significant holdings
  • Never share your private key with anyone

Key Architecture Overview

Understanding Umbra's cryptographic key structure for privacy, spending authority, confidential accounts, and auditability

X25519 Keypair

X25519 keypair for deriving shared secrets via Diffie-Hellman key exchange, enabling encrypted communication and confidential data

On this page

OverviewWhat It DoesSecurity ImplicationsBest Practices