RingCT, short for Ring Confidential Transactions, is how transaction amounts are hidden in ULTRAPOINT.
Ring CT was implemented in November 2017. After November 2017, this feature became mandatory for all transactions on the ULTRAPOINT network.
RingCT introduces an improved version of ring signatures called A Multi-layered Linkable Spontaneous Anonymous Group signature, which allows for hidden amounts, origins and destinations of transactions with reasonable efficiency and verifiable, trustless coin generation.
For more information, please read the creator Shen Noether's paper here.
In short is the form to hide the amount sent in a ULTRAPOINT transaction.
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