1 Reply Latest reply on Mar 8, 2018 10:21 PM by PriyaM_16

    Encrypting and decrypting file for OTA on Avnet-BCM4343W

      Using the Avnet-BCM4343W module and the WICED 5.0 SDK would like to know if is possible to generate an encrypted ".striped.elf" (with a private key), and use this file to update the firmware by OTA (Over the Air).

      Thank you.

        • 1. Re: Encrypting and decrypting file for OTA on Avnet-BCM4343W
          PriyaM_16

          You can create an encypted file by passing it to tool which takes the

          1. application stripped.elf

          2.generated keys

          as input and generate an encrypted file.

          On the device side, you have to incorporate a way to decrypt the encypted file. I am assuming that the keys used for encryption are also being shared somehow witht the client. The application running on the device i.e., OTA_FR should be modified to decrypt the stripped.elf file and save it to flash. 

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