The invention is a secure logic chip with resistance to hardware Trojan induced data leakage. The invention solves the untrustworthy fabrication risk problem by introducing a secure logic chip design such that even when the design is entirely known to an attacker and a data leakage Trojan is injected subsequently, no useful information can be obtained. This invention contains several features including randomized encoding of binary logic, converting any combinational binary logic into one with randomized encoding, and partitioning a randomized encoded logic for split manufacturing.