The current state:
Only 2 of 11 protocols - @TornadoCash and @RAILGUN_Project - are green against every adversary that exists today.
The privileged insider is where 7 of the rest break.
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First, what does the protocol promise to protect?
Link privacy -> the link between two public addresses is hidden
Amount privacy -> only values and balances are hidden (not the link)
Recipient privacy -> only receiver is hidden (stealth addresses)
We highlight this for each protocol, and then we test it against the different adversaries.
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The five adversaries:
👁 Public observer - anyone reading the chain through a block explorer
🔍 Chain analyst - someone who scrapes all the data and uses clustering, timing, heuristics
🌐 Network observer - your RPC, relayer, ISP, the frontend
🔑 Privileged insider - protocol operators, governance, admin view keys
⏳ Future adversary - quantum computers, someone who has all historical data
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Explore more on our Privacy page and let us know what you think!
l2beat.com/privacy/summary
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