At the end of the paper there's a specific hint what was behind NSA's non-wilingness to be explicit, at that time, as Crypto AG from Switzerland is mentioned.

At the end of the paper there's a specific hint what was behind NSA's non-wilingness to be explicit, at that time, as Crypto AG from Switzerland is mentioned. Wikipedia has some details about Crypto AG which are a good afterword to the DMR's article: https://en.wikipedia.org/wiki/Crypto_AG#Compromised_machines https://en.wikipedia.org/wiki/Crypto_AG#Compromised_machines