零知识证明 zkDaily
ZKP Frontier Tracker 🎯
Thu
06.25
2026
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https://pse.dev/blog/lean-imt-plus-efficient-merkle-tree-for-membership-and-non-membership-proofs
Vivian Plasencia Merkle Tree

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零知识证明 zkDaily
Q&A Deep Dive 💬
Thu
06.25
2026
beginner
What is LeanIMT+?
LeanIMT+ is an incremental Merkle tree for membership and non-membership proofs. It helps prove that a value is present or absent.
answer
beginner
Why non-membership proofs?
For revocation, a user must show their credential is not in the revoked set. A non-membership proof proves absence without scanning the whole set.
answer
expert
How is absence proven?
LeanIMT+ proves the predecessor low leaf. If its value is below the target and nextValue is above it or zero, the target is absent.
answer