Tor

Tor, short for The Onion Router, is an open-source anonymity network that helps protect online privacy by encrypting internet traffic and routing it through multiple volunteer-operated relays before it reaches its destination.

Tor uses “onion routing,” where your connection is wrapped in layers of encryption and passed through a sequence of relays (often described as entry, middle, and exit relays). Each relay only knows the previous and next hop, not the full path, which makes it difficult for observers to link your identity to the sites or services you access. This design helps conceal your real IP address from the destination and reduces the ability of network surveillance to profile your activity.

In crypto, Tor is commonly used to improve network-layer privacy. For example, Bitcoin transactions are pseudonymous on-chain, but your IP address can still be exposed when your wallet or node broadcasts transactions to the peer-to-peer network. Running a Bitcoin node or wallet traffic through Tor can make it harder to associate a transaction broadcast with a specific location or internet connection. Some crypto applications also support Tor “onion services,” which allow nodes or services to be reachable without revealing their public network location.

It is important to note that Tor does not make a public blockchain anonymous. It can hide where traffic comes from, but it does not obscure transaction data recorded on-chain. Users should also understand that exit relays can observe unencrypted traffic leaving Tor, which is why secure connections such as HTTPS remain important.

Tor matters because privacy is not only about what appears on-chain, it also includes how transactions and node traffic move across the internet. By reducing IP-based tracking, Tor can help users and node operators strengthen censorship resistance and personal privacy in everyday crypto use.