Sussex Police have launched an investigation following the incident at the University of Chichester, Bognor campus.
It was reported that the victim, a man is his 20s, was raped by a man between 10pm and 10.45pm on January 5.
Police said the victim is being given support by specialist officers.
Images of a man were captured on campus CCTV, with one image showing him wearing glasses and two without.
Officers are looking to speak with the man as they believe he may have information that could help with their enquiries.
Detective Inspector Matt Phelps said: “A thorough investigation has been launched into this incident, with the welfare of the victim as our foremost priority.
“We believe the man pictured here will be of great help to our enquiries and we are keen to speak to him.
“If you can help, please contact us online or via 101, quoting Operation Collingwood.”
Anyone who recognises the man pictured, or has any information that could help with the investigation, is asked to contact police online or via 101, quoting Operation Collingwood.