The Chronicle of Higher Education, Inc. — February 2020 breach
Clustered 2 filings across 1 jurisdiction · filing window May 13, 2020 → Jul 10, 2020. View entity profile → Other incidents for this victim →
incident inc_e2a0a828fc3c431e · merged by deterministic · confidence 99%
Litigation Timing
SupplementalDiscovered → first regulatory filing
Range of discovered_at dates across filings
Time between earliest and latest filing
Not recorded for this incident
Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster.
Incident timeline
Dashed segments are unestablished, not zero — they fill in as filings merge into this incident.
Member cascade — every filing about this breach
- MAY 13CA AGCA AG noticefirst filing · no count statedday 0
- JUL 10CA AGCA AG noticemost recent · no count stated+58d
- Watching for additional filings — new sources merge into this incident automatically.
Roll-up facts — reconciled across members
- Breach window
- Feb 17, 2020 CA AG
- Discovered
- May 10, 2020CA AGJun 19, 2020CA AGfilings disagree on discovery
- Data types
- Credentials · Identity (basic) CA AG
- Attack vector
- Unauthorized Access CA AG
Each fact cites the member filing that establishes it; when filings conflict, every value shows with its source.
Evidence ladder — rungs this incident occupies
No leak-site claim on record for this incident.
No press coverage linked yet.
Unlocks: discovery date, data types, affected count, compliance clock.
No SEC filing or victim statement yet.
Merge provenance
- Method
- deterministic
- Confidence
- 0.99 · above the 0.85 auto-merge floor
- Audit
- Every link edge records its method, confidence and model + prompt versions (99% is the strongest edge).
Merges are reversible — a wrong link can be detached with its audit trail intact. How merging works.
Filing velocity
Spread
58 days
vs. multi-state median
7.3× slower
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. This page states only what the linked filings agree on; each filing's own account stays on its own record, linked from the timeline below.
The weekly clock on records like this one
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