One of the actual big-P Passwords decades ago was actually
0000000
> during the height of the Cold War, the US military put such an emphasis on a rapid response to an attack on American soil, that to minimize any foreseeable delay in launching a nuclear missile, for nearly two decades they intentionally set the launch codes at every silo in the US to 8 zeroes
http://www.todayifoundout.com/index.php/2013/11/nearly-two-d...
...so, a quasi-implicit-and-optional parameter.