The transparent nature of blockchain, which make transactions visible to all participants, is antithetical to privacy. Participants in public blockchains don’t typically need to make their identities known, but researchers have demonstrated how transactions recorded on a blockchain could be linked to individuals. Many DeFi apps incorporate third-party web services that can access the users’ Ethereum addresses. Several DeFi sites rely on third parties and occasionally even leak your Ethereum address to those third parties – mostly to API and analytics providers.

Those third-party services could, in theory, link the Ethereum addresses to other PII( personally identifiable information) including any information that can be used to distinguish or trace an individual‘s identity, such as name, social security number, date and place of birth, biometric records, medical, educational, financial, and employment information.

Ethereum address leakage to Google (the worst scenario) is particularly problematic because the company likely already has PII about you, which it can then link to your Ethereum address and your transaction history on the blockchain and if you combine all these to the information that browser can reveal to the sites you visit, information like IP address, (which trackers can find your geolocation with), cookies which determine what sites and topics you are interested in and even your identity information.

How to protect yourself from being tracked in web3?

1)Use VPN or TOR in order to hide your real IP address

2)Use separate browsers for your routine works and financial works

3)Use mixers to hide your transactions in blockchain (something like Sacred finance)

4)Change your address (if possible) in each transaction.

5)Use anti tracking browser extensions