Sharing public keys

To make the use of the libraries easier, there are some functions to export only the publicTable and publicKeys, which have to be accessible from both the sender and the receiver. Here's how to export and import a PublicKyber object.

Exporting

To export the PublicKyber object, you first create it from a Kyber object and then transform it to a JSON string:

Nim

import nim_kyber/big

var k: Kyber = createRandomKyber(); # Create the kyber object
var public = k.public() # Get the public object
var str: string = public.toString(); # Transform the public object to a JSON string
# You can also use "k.public().toString()" directly

Now share the str variable, which can be imported as done in the next example.

Importing

To import the PublicKyber object from a string, use importPublicKyber.

Nim

import nim_kyber/big

var str = "..." # The exported JSON string
var k: PublicKyber = importPublicKyber(str);

Now you can use k.publicTable and k.publicKeys to create a KyberSender as in this page.