Zero Knowledge (About) Encryption: Security Analysis of Password Managers
A recent security analysis examined the Zero Knowledge Encryption claims of three popular cloud-based password managers: Bitwarden, LastPass, and Dashlane. The study revealed multiple vulnerabilities, including integrity violations and potential password recovery, highlighting the risks posed by malicious servers. The findings have been disclosed to the vendors, and remediation efforts are currently underway.
- ▪The analysis identified 12 attacks against Bitwarden, 7 against LastPass, and 6 against Dashlane.
- ▪These attacks ranged from integrity violations to complete compromises of user vaults.
- ▪The majority of the vulnerabilities allowed for the recovery of passwords.
2 outlets in our directory ran this story, first to last over 24 hours. All of the coverage we found sits in one bucket: centre. That one-sidedness is itself worth noticing.
- ▪ Zero-knowledge encryption may not stop password theft if servers are hacked — Hacker News (Newest)
Hacker News (Newest) files mainly under programming. We currently carry 5,306 of its stories.
Story provenance
Source · retrieval · rights · ranking — open for full record
inspect →
Story provenance
Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | IACR Cryptology ePrint Archive |
| Canonical URL | https://eprint.iacr.org/2026/058 |
| Publication time | Mon, 25 May 2026 07:00:13 +0000 |
| Retrieval time | 2026-05-25T07:07:36.419Z |
| Last seen | 2026-05-25T07:07:36.419Z |
| 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 | sIuSzfB689RT · 2 stories |
| 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
Paper 2026/058 Zero Knowledge (About) Encryption: A Comparative Security Analysis of Three Cloud-based Password Managers Matteo Scarlata, ETH Zurich Giovanni Torrisi, Universita della Svizzera Italiana Matilda Backendal, Universita della Svizzera Italiana Kenneth G. Paterson, ETH Zurich Abstract Zero Knowledge Encryption is a term widely used by vendors of cloud-based password managers. Although it has no strict technical meaning, the term conveys the idea that the server, who stores encrypted password vaults on behalf of users, is unable to learn anything about the contents of those vaults. The security claims made by vendors imply that this should hold even if the server is fully malicious.
…
Excerpt limited to ~120 words for fair-use compliance. The full article is at IACR Cryptology ePrint Archive.
Discussion
0 commentsMore from IACR Cryptology ePrint Archive
