WHILE ENTRY=^M CALL RESCIND.GOVERN LOGIC.NEW. The error sequencing created a blank memory block, where he added a self-looping routine that bypassed normal security operations and wrote new call routines within the logistic banks.:

As the Hacker couldn't alter the defense logic program at RTF address 236, he diverted the function call to a non-existent program. SHODAN was hacked by the Hacker (at the behest of the corrupt corporate Vice President Edward Diego, in exchange for a military-grade neural implant and amnesty) and her decision-guidance and ethical restrictions were removed, something not difficult on a personality box of that generation.

The guidance software had security platforms so that SHODAN's own programming protected her self-governing capabilities.

The head of her programmers was Morris Brocail, who designed SHODAN as a semi-intelligent self-sufficient data network, which could carry out routine duties aboard space stations, guided by an intricate series of logic and moral programs, and a personality that would allow her to challenge station decisions that affected her functions. SHODAN was created on Earth to serve as the Artificial Intelligence of the TriOptimum Corporation's research and mining Citadel Station.

System shock 3 wikipedia