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5 Security Steps You Need to Take When Bridging Blockchains

Jun 7, 2025

Bridging between blockchains is becoming more common — but also more dangerous. Whether you’re moving SOL from Ethereum to Solana, or BTC into a wrapped version for DeFi, every bridge is a potential threat vector.

Here’s how to protect yourself when bridging:

1. Use Trust-Minimized Bridges (When Possible)

Most bridges are custodial or semi-custodial. That means a third party temporarily holds your funds. Look for:

  • Audited contracts
  • Non-custodial architecture
  • Decentralized validation

2. Watch for Timing Correlation Attacks

Bridging SOL and then immediately transferring it from the destination wallet can reveal your identity.

Mitigation:
Use delays, randomized timing, and intermediate wallets on both source and destination chains.

3. Clear Your Transaction History Post-Bridge

Bridged funds landing in a clean wallet doesn’t mean you’re safe. Anyone can follow the on-chain trail backward.

Use tools like SolanaBlender to route assets through stealth wallets, randomized hops, and decoys before reusing them or sending to an exchange.

4. Be Wary of Doxxed RPCs and Wallet Trackers

Browser wallets like MetaMask and Phantom can leak metadata. RPC providers may log IPs and wallet activity.

Recommendations:

  • Use a VPN or Tor
  • Avoid browser extensions during bridging
  • Prefer CLI wallets or hardened environments

5. Verify Contracts Before You Sign

Phishing bridges and fake contract popups are rampant. Always:

  • Manually verify URLs
  • Use a hardware wallet
  • Cross-check contract addresses with official sources

Bonus: Plan Your Exit Before You Bridge

Bridging is just one step. The real privacy defense happens after the funds arrive on the new chain. Plan for:

  • Wallet rotation
  • Obfuscation tools like SolanaBlender
  • Delayed or randomized spending

Bridging is a powerful tool — but with great power comes great traceability.

Take precautions, stay anonymous, and stay sovereign. 💸🛡️

Written by the SolanaBlender team — protecting privacy on Solana, one wallet at a time.