The NSA has been abandoning secret and proprietary cryptographic algorithms in favor of commercial public algorithms, generally known as "Suite B." In 2010, an NSA employee filed some sort of whistleblower complaint, alleging that this move is both insecure and wasteful. The US DoD Inspector General investigated and wrote a report in 2011.
The report -- slightly redacted and declassified -- found that there was no wrongdoing. But the report is an interesting window into the NSA's system of algorithm selection and testing (pages 5 and 6), as well as how they investigate whistleblower complaints.
from Whistleblower Investigative Report on NSA Suite B Cryptography
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