Security? What aspect of it? If your company is working on multiple projects for which different levels of security clearance are required, then there is litt

Security? What aspect of it? If your company is working on multiple projects for which different levels of security clearance are required, then there is little choice but to use multiple repositories. Similar, if you work on projects for which the customers require following incompatible standardized (codified) procedures, then too multiple repositories are the obvious choice. If the company you work for is in danger of being split up (for legal, commercial or other reasons) and different projects might go different paths, then you'd be happy to have chosen multiple repositories as well. I'd think, one would have to have a very good reason to put multiple projects in a single repository.