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by espresso64
Mon Aug 25, 2025 5:43 am
Forum: Hardware
Topic: Secure Downlaod mode & Secure Boot efuses on the ESP32-S3
Replies: 3
Views: 467

Re: Secure Downlaod mode & Secure Boot efuses on the ESP32-S3

Edit: I meant non-secure Download mode - people shouldn’t leave it in production :shock:
by espresso64
Mon Aug 25, 2025 5:42 am
Forum: Hardware
Topic: Secure Downlaod mode & Secure Boot efuses on the ESP32-S3
Replies: 3
Views: 467

Re: Secure Downlaod mode & Secure Boot efuses on the ESP32-S3

Makes sense. Thanks! So I guess it’s safe to assume that this setup isn’t very safe at all, so one better doesn’t leave non-Secure download mode enabled in production devices.

I was actually thinking of that, like a voltage glitch of some sort (even if the brownout-type of reset occurs, doesn’t ...
by espresso64
Sun Aug 24, 2025 9:54 pm
Forum: Hardware
Topic: Secure Downlaod mode & Secure Boot efuses on the ESP32-S3
Replies: 3
Views: 467

Secure Downlaod mode & Secure Boot efuses on the ESP32-S3

Hi,

I was wondering what are the risks if an ESP32-S3 device had ENABLE_SECURITY_DOWNLOAD set to False, but SECURE_BOOT_EN set to True. This would mean that Secure Download mode is disabled, but secure boot is enabled. For the sake of the argument, let's also say that ICACHE and DCACHE aren't ...

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