Comment on Factoring RSA Keys with Many Zeros by Weather
Factoring RSA Keys with Many Zeros Interesting research on a new class of weak RSA keys: keys with lots of zeros. It turns out that these keys are out in the wild. The badkeys project is an open-source service that checks public keys for known vulnerabilities.
- ▪Factoring RSA Keys with Many Zeros Interesting research on a new class of weak RSA keys: keys with lots of zeros.
- ▪It turns out that these keys are out in the wild.
- ▪The badkeys project is an open-source service that checks public keys for known vulnerabilities.
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| Original publisher | Schneier on Security » Comments Feed |
| Canonical URL | https://www.schneier.com/blog/archives/2026/06/factoring-rsa-keys-with-many-zeros.html/#comment-456225 |
| Publication time | Sun, 26 Jul 2026 05:55:14 +0000 |
| Retrieval time | 2026-07-26T08:49:07.854Z |
| Last seen | 2026-07-26T08:49:31.411Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | VH0-326L-gNT |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Factoring RSA Keys with Many Zeros Interesting research on a new class of weak RSA keys: keys with lots of zeros. It turns out that these keys are out in the wild. The badkeys project is an open-source service that checks public keys for known vulnerabilities. While developing this tool, Hanno collected a massive number of real-world keys from public sources, including Certificate Transparency logs, internet-wide TLS and SSH scans, PGP keys, and many others. By searching this dataset for unexpectedly sparse RSA moduli, we uncovered a large number of keys in the wild with the patterns in Figure 1. Both patterns include several regularly spaced blocks of all zeros interleaved with seemingly random data.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Schneier on Security » Comments Feed.