DES is an example of where people were sure that NSA persuaded IBM to weaken it but, to quote Bruce Schneier, "It took the academic community two decades to fig

DES is an example of where people were sure that NSA persuaded IBM to weaken it but, to quote Bruce Schneier, "It took the academic community two decades to figure out that the NSA 'tweaks' actually improved the security of DES". <https://www.cnet.com/news/privacy/saluting-the-data-encryption-legacy/ https://www.cnet.com/news/privacy/saluting-the-data-encrypti...>