Stealth Addresses

Stealth addresses are a method for protecting recipient privacy in cryptocurrency transactions, letting a sender non-interactively generate a new address for the recipient so the transaction looks like it went to a random account. The approach is based on ERC-5564, which outlines a basic framework for implementing stealth addresses. A recipient publishes a stealth meta-address made of a spending public key and a viewing public key, each compressible to 33 bytes. The article notes that the viewing key can be shared with trusted parsing providers, while the spending key must stay private, and it says stealth addresses have been implemented on Ethereum mainnet and some L2s by ScopeLift under the name Umbra.