[Question] Is public data in the rangeproof secure. about bulletproofs

[cathieyun]

Can you clarify what you mean by "secure"? Do you mean to ask if k would remain secret with this new construction?

In a very handwavey way, if k = k' + j, k and k' are secret and j is public, then you still shouldn't have any information given j to deduce what k is (as long as k' is chosen "well"). But what are you trying to achieve with adding j? How are j and k' chosen?

[SWvheerden]

Hi, thanks for the replay.
Yes I was asking about if k' would still be secure.

j is chosen from public variables. While k' is chosen randomly. The end goal for this is using the bulletproof to "lock" certain values if I can call it that.

This was the end goal we wanted to achieve:
https://rfc.tari.com/RFC-0201_TariScript.html