Transaction Security

Practical security checks for sending, receiving, verifying addresses, and avoiding transaction mistakes.

Bitcoin Transaction Security

Most self-custody attention goes to seed phrase storage. But every send involves a separate set of security decisions, from address verification to fee selection to how the transaction reaches the signing device.

What is Bitcoin UTXO Management?

Bitcoin has no account balance, only UTXOs. Learn what UTXOs are, why managing them affects fees and privacy, and how to manage them well.

Bitcoin Address Reuse and Management

Reusing a Bitcoin address links all your transactions permanently on-chain. Learn why address reuse hurts privacy and how HD wallets and coin control prevent it.

What is the Bitcoin Mempool?

The Bitcoin mempool holds unconfirmed transactions waiting for miners. Learn how it works, how to read mempool.space, and what to do when a transaction gets stuck.

What are Bitcoin Transaction Fees?

Bitcoin fees are priced per virtual byte, not per transaction. Learn how sats/vbyte works, why SegWit addresses are cheaper, and how to set the right fee rate.

How to Verify Bitcoin Transactions

On-device verification is the last line of defense before a Bitcoin transaction is signed. Learn how to check addresses, amounts, and fees on your signing device before every send, and how to confirm your transaction after broadcast.