Privacy-preserving anomalous behavior detection

A method comprising:

• storing a tree structure via a blockchain storage, the tree structure comprising anonymous behavior data of a plurality of blockchain participants stored in a plurality of nodes in a hierarchical structure;
• receiving a request to add new anonymous behavior data to the tree structure, the request comprising a zero-knowledge proof generated by a blockchain participant;
• identifying an active leaf on the tree structure which stores previously recorded anonymous behavior data of the blockchain participant associated with the request based on the zero-knowledge proof;
• generating a new active leaf for the blockchain participant based on the new anonymous behavior data and the previously recorded anonymous behavior;
• and
• storing the new active leaf as a leaf node on the tree structure in the blockchain storage.

A non-transitory computer readable medium comprising instructions, that when read by a processor, cause the processor to perform a method comprising:

• storing a tree structure via a blockchain storage, the tree structure comprising anonymous behavior data of a plurality of blockchain participants stored in a plurality of nodes in a hierarchical structure;
• receiving a request to add new anonymous behavior data to the tree structure, the request comprising a zero-knowledge proof generated by a blockchain participant;
• identifying an active leaf on the tree structure which stores previously recorded anonymous behavior data of the blockchain participant associated with the request based on the zero-knowledge proof;
• generating a new active leaf for the blockchain participant based on the new anonymous behavior data and the previously recorded anonymous behavior;
• and
• storing the new active leaf as a leaf node on the tree structure in the blockchain storage.