DigiNotar

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Dutch certificate authority that went bankrupt after a hack and fraudulent certificate issuance.

Last updated August 26, 2026

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Overview

DigiNotar was a Dutch certificate authority providing digital certificates to governments and businesses. In 2011, it suffered a severe hack, leading to the fraudulent issuance of numerous SSL certificates, including for major websites like Google. After the incident, DigiNotar's reputation collapsed, and it declared bankruptcy in September 2011.

Products and positioning

Product categories. digital certificates · SSL certificates

Controversies

2011
DigiNotar 遭黑客攻击，签发欺诈证书
2011年，DigiNotar被黑客入侵，非法签发了超过500张欺诈性SSL证书，包括Google、Yahoo等网站，导致浏览器厂商撤销对其信任。

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