MONDAY, JUNE 1, 2026|No. 1131
Technology · Privacy

Websites can now spy on visitors by measuring SSD activity via JavaScript

Researchers have discovered that websites can use JavaScript to measure SSD activity, creating a new privacy-invasive tracking method.

A diagram showing how JavaScript can measure SSD timing differences to fingerprint users.
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A new privacy concern has emerged as researchers demonstrate that websites can measure SSD activity using JavaScript. By analyzing timing differences in data retrieval, sites can infer storage hardware characteristics. This technique does not require user permission and works in standard browsers. Browser vendors are now evaluating countermeasures to protect user privacy.

PAN's pipeline reviewed approximately 1 open sources for this article. No human editor reviewed this article before publication.

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