Popularized by the cryptocurrency Monero (XMR), Ring CTs (Confidential Transactions) is a protocol which leverages complex cryptographic primitives known as Ring Signatures, for the preservation of privacy and anonymity.
While the technology in ring signatures is designed to obfuscate the input/sender side of transactions, Ring CT’s build upon this and take the extra necessary precautionary measure to obfuscate both parties involved in transactions (sender/receiver)