AUTHOR’S NOTE
The information security world was rocked in 2012 when a number of revelations came to light about the full extent of government surveillance in the US, UK and elsewhere. As a result a number of concerns have arisen among security professionals, not least the potential for ‘back doors’ in some commonly used encryption algorithms, which could be exploited by government entities. Despite these revelations, the basic premise behind information security in general, and the role of encryption in particular, remain as important as ever.
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