Is synonymous with a core subset in the Tornado Cash intelligent contracts: the Tornado Cash swimming pools. The vast majority of those contracts are immutable. Which is, they have no capacity to be up-to-date or taken off by any one. A complete list of sanctioned, immutable Tornado Cash pools are https://sqrrmu.com/tornado-cash-explained-how-it-ensures-unmatched-confidentiality-on-ethereum-and-bnb/