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Microsoft’s “chip-to-cloud Zero Trust” security promise for Windows 11 has become instantly controversial thanks to some unpopular decisions. Key among them: Requiring a TPM 2.0 security chipset, which could prevent millions of PCs from upgrading.

For those unfamiliar, TPM 2.0, or Trusted Platform Module 2.0, is a chip on a PC motherboard or some software code integrated into a modern CPU. It is designed “to help protect encryption keys, user credentials, and other sensitive data behind a hardware barrier so that malware and attackers can’t access or tamper with that data,” as Microsoft describes it. And we first heard about this technology when Microsoft announced Longhorn in 2003. Today, TPM underpins Windows security features like Windows Hello and BitLocker drive encryption.

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