The National Security Agency doesn’t have secret coding practices or testing methods that make their applications and systems bulletproof. In fact, one of the agency s top technical experts said that virtually all of the methods the NSA uses for development and information assurance are publicly known. Neil Ziring, technical director of NSA’s Information Assurance Directorate, said that even within the NSA, the problems of application security remain maddeningly difficult to solve. Ziring: “Apps have become the primary targets of attackers. We ve certainly seen this in the government as well as in industry”””
Source: https://threatpost.com/nsa-our-development-methods-are-open-now-111010/74657/

