Across the globe, books have been banned throughout history. Even in countries that value and protect free speech, certain texts are still subject to bans - such as those that occur at the public school level in the United States.

Not all encryption is created equal. In the case of last year's failed military coup in Turkey, authorities were able to trace thousands of suspected participants by cracking an insecure 'encrypted' messaging app. The arrests keep coming a year later.

A recent study found that even small sites are being attacked as often as eight times per day.