Grin privacy refers to the privacy features and technology used by the Grin cryptocurrency, which was launched in 2019. Grin is a privacy-focused coin that uses the Mimblewimble protocol to enable secure and anonymous transactions. Unlike other cryptocurrencies, such as Bitcoin, there are no addresses or transaction amounts visible on the blockchain. Instead, Grin uses a protocol that obfuscates transaction data, making it impossible to trace transactions back to the users who made them. Additionally, Grin transactions can be made with a higher level of anonymity by using Tor or other anonymizing services. Overall, Grin offers a high level of privacy for users who prioritize anonymity and security in their cryptocurrency transactions.