Source: http://www.theverge.com/2014/12/24/74482...

It's been an interesting day for Kernel, the site powering Sony's digital rentals of The Interview in the US. Not only did it briefly buckle under the pressure of people hammering its site to watch the movie, but apparently it didn't do a great job in securing copies of the film, either. Those who spent $5.99 to watch a 48-hour rental of The Interview on their browser could simply share the URL of the film with anyone else. Worse yet, anyone who had access to the link was able to save an unprotected copy locally through a super obvious loophole, something The Verge was able to confirm from different browsers and locations.