Re:How the CIA used Crypto AG encryption devices to spy on c...
by maqp on Wednesday February 12, 2020 @03:09PM
(#22312270)
"by far the largest weak point"
Well, if the nested ciphers are all properly implemented AEAD schemes, use unique keys, and don't rely on public key crypto for key exchange, cascading crypto is fine.
Other than that their discourse was that of a novice, sure.
Examples: “side channel such as a backdoor that secretly stores keys used somewhere”, “blowfish”, nonsensical mixing of block ciphers and stream ciphers without regard for the complete construction or the implementation (by far the largest weak point), etc.