encrypting nonce between client and server

[nmarandi]

Is there any way to encrypt nonce between client and server?

I used Key exchange and Authenticated encryption.

For decryption, I need to send nonce alongside the message. Is there any way to encrypt nonce?

[jedisct1]

Bellare recently published a paper about this: https://eprint.iacr.org/2019/624.pdf

But maybe you should explain the problem you are trying to solve first.

With 192-bit nonces, you can safely use random nonces instead of a counter. A middle box would learn nothing from such nonces.

[nmarandi]

Thank you for your fast reply.
I will read the paper you sent.
Mostly, I wanted to know whether encrypting nonce is needed or not.
Currently, I use randombytes_buf to generate a nonce.
So I can assume that sending nonce without encryption is ok.
Thanks!

[jedisct1]

Nonces don't have to be secret. They just have to be different for each message.