I think this is a great concept, yet perhaps too little, too late (Journalists should know PGP and drop boxes like these should have been common already). I also worry a bit because of Washington Post's track record with leaks, of the top of my head:
- Washington Post was Snowden's first choice, but they put up enough demands for Snowden to move to The Guardian. [1]
- Washington Post, according to Assange, had access to the "Collateral Murder" video a whole year before WikiLeaks published their edited video. [2]
- Washington Post employs op-ed columnists that call for assassination of "criminally dangerous" leakers like Assange [3]
[1] http://nymag.com/daily/intelligencer/2013/06/nsa-leaker-shop... [2] http://www.abc.net.au/foreign/content/2010/s3040234.htm [3] http://www.washingtonpost.com/wp-dyn/content/article/2010/08...
EDIT: More information on SecureDrop: https://pressfreedomfoundation.org/securedrop and source here: https://github.com/freedomofpress/securedrop