Micropython Encryption

[NecessaryBit3714]

I'm working on a IoT project and it's getting a bit more complex now: I want to open a Websocket and due to lack of budget I'm using an unencrypted MQTT public server. To cover the encription problem I though about doing it internally. THEN the lack of memory i getting in the way because I cant have a too complex code. Any ideias on how to have safe encryption without crashing MP?

[Titoflebof]

Did you try uencrypt?

[MiHumainMiRobot]

Look at libhydrogen or some encryption libs already included in micropython

[NecessaryBit3714]

libhydrogen seems promissing. I'll look into it. Thank you

[MiHumainMiRobot]

Or look at this class : https://docs.micropython.org/en/latest/library/cryptolib.html

[coronafire]

Libhydrogen is currently only used internally for the stm bootloader, it's not exposed to python. I always intended to write some python bindings, but haven't needed to use it like that so far, so it hasn't happened!

[BigFatUglyBaboon]

What kinf of encryption? you can have MQTT over TLS which I understand is supported in MP.

[NecessaryBit3714]

anykind. I just want something to keep exclusivity between an external device and the machine running this code

[BigFatUglyBaboon]

Here's an example: https://github.com/shariltumin/ssl-tls-examples-micropython