Honestly this "report" is similarly devoid of any substantive content despite being the original source. At some point they discuss the dictionary meaning of DSP.
Your best bet for any details is apparently this DEF CON presentation:
Thanks for the link, but the Ars report provides some additional context that I think is informative and useful, and is written in a more readable style than the Checkpoint press release.
Here's the actual report: https://blog.checkpoint.com/2020/08/06/achilles-small-chip-b...