# Key Re-Use and Associated Risks
As an additional firewall, a new key pair should be used for each transaction to keep them from being linked to a common owner.
\- Satoshi Nakamoto, Bitcoin Whitepaper
One of the critical aspects of maintaining privacy in Bitcoin transactions is the practice of **key re-use**. It is recommended that users generate a new key pair for each transaction **to prevent the linking of transactions to a common owner**. When a user receives funds into a re-used locking script, it becomes easier for observers to track the funds and their movement. This risk can be mitigated by adopting a strategy of **using a new private key for each incoming transaction**, effectively separating the digital coins on the ledger.
Most modern wallets are equipped with features that facilitate this practice through **Hierarchical Deterministic Keychains**. This technology allows users to **generate an effectively unlimited number of key pairs from a predetermined seed**, enhancing both security and privacy.
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