RingCT, short for Ring Confidential Transactions, is how transaction amounts are hidden in Dinastycoin.
Ring CT was implemented in the block with version 4.11 in 2022, this feature has become mandatory for all transactions on the network.
RingCT introduces an improved version of Ring Signatures called “A Multi-Level Linkable Spontaneous Group Signature”, which enables hidden amounts, origins and destinations of transactions with reasonable efficiency and verifiable and reliable coin generation.
For more information, read the article by creator Shen Noether here.