Comment by chasil

The original exploit concern was the use of the "Viterbi Algorithm."

http://www.cs.berkeley.edu/~dawnsong/papers/ssh-timing.pdf [2001]

The addition of ML has greatly improved the accuracy of audio decoding - use a silent keyboard in any insecure physical locale.

https://arstechnica.com/gadgets/2023/08/type-softly-research...