Your Cryptography Conspiracy Theory Is Wrong

The central argument is that distrust of government, especially after the Snowden disclosures, is understandable, but many conspiracy claims about cryptography confuse suspicion with technical evidence. The writer argues that agencies such as the NSA are powerful but not omniscient, and that their actions make more sense when viewed through competing missions: protecting communications and gathering intelligence. The history of DES illustrates this tension. The NSA’s changes to its S-boxes strengthened the cipher against differential cryptanalysis, a technique it had discovered in secret, while its push to reduce the key to 56 bits made DES vulnerable to brute force. That history supports concern about intelligence agencies’ influence, but not the claim that every intervention was a hidden backdoor.

Other episodes provide clearer grounds for alarm. The Clipper Chip was designed with law-enforcement key escrow and proved technically flawed, prompting resistance from independent cryptographers. Dual_EC_DRBG, an unusually slow random-number generator that experts publicly questioned, was later confirmed through Snowden-era revelations to contain an NSA backdoor; a related design weakness was subsequently exploited by a rival nation in Juniper equipment. These cases show that proposed backdoors can be exposed and can benefit adversaries beyond their intended users. The Snowden disclosures also revealed bulk phone-metadata collection, Internet surveillance programs such as PRISM, and undersea-cable interception. Together, the examples call for evidence-based scrutiny: governments have abused surveillance powers, but technical claims still need coherent mechanisms and facts.