Field notes on cloud phones and bans

What we learn taking apart attestation SDKs and running 6.1M+ accounts, written down before we forget it.

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Teardowns··12 min read

Snapchat Device Attestation v4: a complete teardown

Snap shipped attestation v4 on 12 July with no announcement. We had a patch out in 19 hours. Here is what changed and why it kills container-based cloud phones outright.

Economics··9 min read

Phone farm vs cloud phone: the real 5-year TCO

Everyone compares handset price to monthly rental and stops there. That comparison is wrong by a factor of three. Here is the full model, including the line item nobody counts.

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Everything we have written

Teardowns··8 min read

The 14 signals that get cloud phones banned

Every cloud phone ban traces back to one of fourteen signals. Nine of them are patchable. Five are not, and those five are why architecture beats spoofing.

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Teardowns

Teardowns··12 min read

Snapchat Device Attestation v4: a complete teardown

Snap shipped attestation v4 on 12 July with no announcement. We had a patch out in 19 hours. Here is what changed and why it kills container-based cloud phones outright.

Teardowns··8 min read

The 14 signals that get cloud phones banned

Every cloud phone ban traces back to one of fourteen signals. Nine of them are patchable. Five are not, and those five are why architecture beats spoofing.

Topics

Playbooks

Topics

Economics

Economics··9 min read

Phone farm vs cloud phone: the real 5-year TCO

Everyone compares handset price to monthly rental and stops there. That comparison is wrong by a factor of three. Here is the full model, including the line item nobody counts.

Topics

Post-mortems

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