Matthew Green clarifies: his worry is standardized public-key encryption's narrow problem base
matthew_d_green · x · 2026-10-09
The third part of Matthew Green's cryptography thread adds nuance to his position on the "encryption broken" rumor:
- He stresses the original tweet was written quickly, and he is not worried about public-key cryptography in principle.
- His real concern: standardized public-key encryption (and some signatures) are built on a small number of hard problems — a break in one would cascade across every system relying on those standards.
Combined with the earlier posts: no imminent cryptanalysis known, but concentration risk in crypto standards remains his core worry.
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