Based on El Gamal homomorphic encryption

a protocol of secure multi-party multi-data ranking problem was proposed.The problem extended millionaires’ problem.Furthermore

the correctness and security of this protocol were shown in semi-honest model

using the definition of secure multi-party computation.The solution of secure multi-party multi-data ranking problem can form a fundamental basis of new-style electronic transaction

such as private biding and auction

secret online transaction and so on.