Steal to Your Heart’s Content: Google Just Made Stolen Chrome Sessions Useless in Minutes

Google has enabled Device Bound Session Credentials (DBSC) in the stable version of Chrome 146 for Windows. This mechanism cryptographically binds your active session to a specific device — so if malware tries to steal your session cookies, they’ll be completely useless on another machine.

The protection relies on the TPM (Trusted Platform Module) security chip in Windows. The browser generates a key pair right inside that module, and the private key physically cannot be exported outside the device. When a server hands out short-lived session cookies to the browser, Chrome has to prove ownership of that key every time those cookies get refreshed. Without the key, stolen data turns into worthless junk in just a few minutes.

Google argues that once sophisticated malware has access to your system, stopping cookie theft with purely software-based methods is next to impossible. Attackers are using info-stealers like LummaC2 that keep getting smarter — they read local files and browser process memory where authentication data is stored. DBSC sidesteps the problem not at the software level, but at the hardware level. Even if the malware steals your session cookie, it just can’t use it.

Developers don’t have to rewrite their apps from scratch. To add support for hardware‑bound sessions, you only need to add two endpoints on the backend: one to register the session when the user logs in, and another to refresh the short‑lived cookies. The old frontend keeps working without any changes. Previously, Google launched an AI‑powered “office assistant” in Chrome.

For regular users, it all happens invisibly — nothing to configure, install, or pay for. Just update Chrome to version 146 on Windows, and the browser will automatically start using hardware‑bound sessions on sites that support the mechanism. There aren’t many such sites yet, but Google expects the standard to catch on, especially among financial services, email systems, and corporate portals.

What do you think — will hardware‑bound sessions become the de facto standard for all browsers, or will hackers quickly find a way to bypass even this kind of protection? Drop your thoughts in the comments.