Some security experts recognize that interdependencies increase risk and recommend that an organization practice code$/$program diversity to reduce the impact of a single flaw. For example, an organization that allows its employees to use a mix of different operating systems according to individual preference will be more likely to avoid total organizational compromise from a single software flaw than an organization that requires all employees to use a single operating system.

With which security principle does this idea best align?

Fail$-$safe default

Complete mediation

Isolation

Least common mechanism