Your SAS source code statements (in a file) must be protected using an OS-standard utility of some type. You can then compile your program in SAS, saving the compiled object to a SAS library and password-protect that file/object -- while still making it available for execution.
Good news: We've extended SAS Hackathon registration until Sept. 12, so you still have time to be part of our biggest event yet – our five-year anniversary!