application level encryption

RE: application level encryption

bjorn-spockeli — Fri, 22 Sep 2017 09:23:01 GMT

@nicolagallazzi: The Secure Bootloader introduced in SDK v12.x.x. and later will only verify the signature of the firware image. We do not encrypt the firmware image before transmitting it over the BLE link.

RE: application level encryption

Nicola Gallazzi — Fri, 22 Sep 2017 08:43:43 GMT

So, i assume that the application file itself is encrypted with ECDH isn't it?

RE: application level encryption

bjorn-spockeli — Tue, 20 Sep 2016 12:00:43 GMT

Yes, that should be possible.

RE: application level encryption

ponlakshmi — Tue, 20 Sep 2016 11:54:44 GMT

So by using ECDH we can encrypt the data in sender side and using the same algorithm we can decrypt the data in receiver side.

RE: application level encryption

ponlakshmi — Tue, 20 Sep 2016 09:51:03 GMT

Can we use other encryption RSA,Blowfish,Twofish,AES,ECC?????

RE: application level encryption

bjorn-spockeli — Tue, 20 Sep 2016 09:22:39 GMT

It is possible to use the AES block to do electronic codebook mode encryption (ECB) at the application level, please take a look at this answer. Please note, that you're only able to do encryption, and not decryption.

The bootloader's cryptography library supports ECDSA (Elliptic Curve Digital Signature Algorithm) and ECDH (Elliptic Curve Diffie-Hellmann) which can be used to sign and encrypt data respectively.

As for the other encryption methods you're mentioning, e.g. DES, Twofish, Blowfish, RSA, then the answer is no, it is not supported at the application level.

-Bjørn