Lexicographic analysis, I think it's called. Back at university, they would run checks against the byte-code (Java, woo) to find people who were sharing their s

Lexicographic analysis, I think it's called. Back at university, they would run checks against the byte-code (Java, woo) to find people who were sharing their source. Caught a few people out in the earlier years who thought changing variable names was enough to avoid plagiarism.