# Flash Encryption

A hardware-backed ESP32 feature that encrypts off-chip flash contents to protect them from physical readout.

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## ESP32-C2: A Wi-Fi and BLE Chip for High-Volume IoT Applications

DevFeed: [ESP32-C2: A Wi-Fi and BLE Chip for High-Volume IoT Applications](<https://devfeed.tech/articles/esp32-c2-and-why-it-matter-s-13853.md>)

Original publisher: [Read original article](<https://developer.espressif.com/blog/esp32-c2-and-why-it-matter-s/>)

Author: John Lee

Published: 2022-04-18T00:00:00Z

Content type: article

Language: en

Sources: [Blog on Developer Portal](<https://devfeed.tech/sources/blog-on-developer-portal.md>)

Topics: [Esp32 C2](<https://devfeed.tech/topics/esp32-c2.md>), [Internet of things](<https://devfeed.tech/topics/iot.md>), [ESP-IDF](<https://devfeed.tech/topics/esp-idf.md>), [Flash Encryption](<https://devfeed.tech/topics/flash-encryption.md>), [Secure Boot](<https://devfeed.tech/topics/secure-boot.md>)

Tags: [blog](<https://devfeed.tech/tags/blog.md>), [ceo-blog](<https://devfeed.tech/tags/ceo-blog.md>), [esp-idf](<https://devfeed.tech/tags/esp-idf.md>), [esp32](<https://devfeed.tech/tags/esp32.md>), [esp32-c2](<https://devfeed.tech/tags/esp32-c2.md>), [esp32-c6](<https://devfeed.tech/tags/esp32-c6.md>), [espressif](<https://devfeed.tech/tags/espressif.md>), [flash-encryption](<https://devfeed.tech/tags/flash-encryption.md>), [iot](<https://devfeed.tech/tags/iot.md>), [secure-boot](<https://devfeed.tech/tags/secure-boot.md>)

### AI overview

ESP32-C2 is a Wi-Fi and Bluetooth Low Energy chip designed for simple, high-volume, low-data-rate IoT applications. The article describes its compact package, ESP-IDF support, security features, and RF performance.

### Source excerpt

As many would have heard, Shanghai is now undergoing a major lockdown and quarantine due to COVID-19. In the midst of this lockdown, we received our production wafers of ESP32-C2, and proceeded with the verifications. Due to the quarantine, we have faced some logistics problems, but slowly, we have improvised, worked out solutions and continue to move ahead with the ramp up of this product.

## Understanding ESP32's Security Features

DevFeed: [Understanding ESP32's Security Features](<https://devfeed.tech/articles/understanding-esp32-s-security-features-13965.md>)

Original publisher: [Read original article](<https://developer.espressif.com/blog/understanding-esp32s-security-features/>)

Author: John Lee

Published: 2018-05-31T00:00:00Z

Content type: article

Language: en

Sources: [Blog on Developer Portal](<https://devfeed.tech/sources/blog-on-developer-portal.md>)

Topics: [ESP32](<https://devfeed.tech/topics/esp32.md>), [Flash Encryption](<https://devfeed.tech/topics/flash-encryption.md>), [Secure Boot](<https://devfeed.tech/topics/secure-boot.md>)

Tags: [blog](<https://devfeed.tech/tags/blog.md>), [building-products](<https://devfeed.tech/tags/building-products.md>), [security](<https://devfeed.tech/tags/security.md>)

### AI overview

An overview of ESP32v3 secure boot and flash encryption. It explains how these features help protect external SPI flash contents from unauthorized reading and tampering, using eFUSE-stored keys and a hardware-to-firmware chain of trust.

### Source excerpt

[This document discusses security features for ESP32v3. If you are looking for the security features of the latest ESP32-S2 SoC, that article is available here.] The ESP32v3 has two interesting features, secure boot and flash encryption. Let's have a quick overview of these features. Typically when a device is shipped, any firmware or data is stored in the SPI flash connected to the ESP32v3.