Published: October 29, 2025
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ICYMI: Microsoft Authenticator for iOS + Android will detect, prevent, then wipe Entra creds on rooted devices (MC1179154). • Phase 1 (warn mode) begins February '26 • followed by Phase 2 (block mode) • then Phase 3 (wipes Entra creds) • expected to be completed ~April '26

Image in tweet by Ru Campbell

@rucam365 Should have been done years ago

@mwfowlie @rucam365 And this sets a precedent that most other 2FA managers will follow. This isn't a security assessment, it is a jail assessment. Aka: are you trusting us completely from boot to app? This is not your device so no other secure OS is allowed, only ours with our ads and telemetry.

@Tiky8192 @rucam365 It’s completely security related. It prevents rootkits and similar security issues.

@mwfowlie @rucam365 I agree that's one of the goals, but it comes at the cost of freedom and resilience. Every device now shares the same roots of trust. It works well until there's a breach, then everyone is affected at once (no diversity). It delegates trust to big tech rather than letting

@Tiky8192 @rucam365 That’s a complete non starter when it comes to things like insurance and financial risk.

@mwfowlie @rucam365 Why wouldn't insurance firms evaluate other security tools like on PC? Sounds like financial services, the first to adopt safetynet by default, decided they were co-owners of all mobile devices just because they can process transactions. Yet, I can still purchase via PayPal in my

@mwfowlie @rucam365 Yea sorry I'm a bit frustrated by the dual-standard and by devices looking more and more like rentals. I wouldn't imagine using my PC and having PayPal tell me I can't login because I can sudo to root.

@Tiky8192 @rucam365 I haven’t used PayPal in a while but I can comment on other financial institutions. For example, many require 2FA on a per new recipient level, where the 2FA couldn’t be used for a different recipient even if your machine is untrusted.

@mwfowlie @rucam365 I see where this is going... Microsoft 2FA first, then others follow. Once everyone's onboarded, replace HMAC-SHA1 TOTP with "TOTP-2.0" that requires hardware attestation. Rooted devices relegated to insecure SMS as "legacy devices." Tell me that's not the plan.

@Tiky8192 @rucam365 If you want to access financial institutions, corporate intellectual property, streaming content covered by copyright, etc. then absolutely this is going to happen.

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