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Vol. 1 · Ed. 2026
CyberGlossary
Entry № 305

Data Broker

Data Broker とは何ですか?

Data BrokerA business that aggregates personal data about consumers from public, commercial, and observed sources and sells it onward — increasingly regulated under California's Delete Act, U.S. state data-broker registries, EU privacy law, and CFPB Section 1033 rules.


A data broker is a business whose primary activity is the collection, aggregation, and resale of personal information about consumers with whom it has no direct relationship. Inputs include public records (court filings, voter rolls, property), commercial sources (loyalty programs, retailers, telcos, ISPs), observed online behavior (advertising IDs, location SDKs), and people-search scrapes. Outputs range from people-finder sites to enterprise marketing, debt-collection, risk-scoring, and increasingly to private intelligence and national-security buyers. Regulation has accelerated. California's SB 362 (Delete Act, 2023) requires data brokers to register and to honour deletion requests via a single central interface starting in 2026. Vermont, Texas, Oregon, and other U.S. states maintain registries. The EU GDPR treats brokers as 'controllers' subject to data-subject rights and Article 14 information obligations even when data is collected indirectly. The U.S. CFPB has pursued data brokers under FCRA, and federal proposals continue to address bulk data sales to foreign adversaries. For privacy programs, data brokers are an underestimated source of PII and a documented vector for executive-protection and physical-safety risks.

  1. 01

    An executive-protection team submits deletion requests to dozens of U.S. people-search data brokers via the upcoming California Delete Act central registry to suppress home-address exposure.

  2. 02

    A privacy review of a free mobile app finds that a third-party SDK silently sells precise GPS coordinates to a location-data broker.

よくある質問

Data Broker とは何ですか?

A business that aggregates personal data about consumers from public, commercial, and observed sources and sells it onward — increasingly regulated under California's Delete Act, U.S. state data-broker registries, EU privacy law, and CFPB Section 1033 rules. サイバーセキュリティの プライバシーとデータ保護 カテゴリに属します。

Data Broker とはどういう意味ですか?

A business that aggregates personal data about consumers from public, commercial, and observed sources and sells it onward — increasingly regulated under California's Delete Act, U.S. state data-broker registries, EU privacy law, and CFPB Section 1033 rules.

Data Broker はどのように機能しますか?

A data broker is a business whose primary activity is the collection, aggregation, and resale of personal information about consumers with whom it has no direct relationship. Inputs include public records (court filings, voter rolls, property), commercial sources (loyalty programs, retailers, telcos, ISPs), observed online behavior (advertising IDs, location SDKs), and people-search scrapes. Outputs range from people-finder sites to enterprise marketing, debt-collection, risk-scoring, and increasingly to private intelligence and national-security buyers. Regulation has accelerated. California's SB 362 (Delete Act, 2023) requires data brokers to register and to honour deletion requests via a single central interface starting in 2026. Vermont, Texas, Oregon, and other U.S. states maintain registries. The EU GDPR treats brokers as 'controllers' subject to data-subject rights and Article 14 information obligations even when data is collected indirectly. The U.S. CFPB has pursued data brokers under FCRA, and federal proposals continue to address bulk data sales to foreign adversaries. For privacy programs, data brokers are an underestimated source of PII and a documented vector for executive-protection and physical-safety risks.

Data Broker からどのように防御しますか?

Data Broker に対する防御は通常、上記の定義で述べたとおり、技術的統制と運用上の実践を組み合わせます。

Data Broker の別名は何ですか?

一般的な別名: Information broker, People-search broker。

関連用語