Re: Provable secure Authenticated Encryption scheme

Also, Is AES-GCM-SIV recommended by NIST?

I see a proposal over here - 
https://csrc.nist.gov/CSRC/media/Projects/Block-Cipher-Techniques/documents/BCM/proposed-modes/aes-gcm-siv/aes-gcm-siv-may2019.pdf

On Thursday, 25 February 2021 at 17:26:40 UTC-5 Devharsh Trivedi wrote:

> Thank you for the prompt response. :)
>
> Yes I am planning to use a new KEY for each message. (Keeping the IV/nonce 
> same)
>
> How about AES-GCM-GMAC? Is it same as AES-GCM?
>
> Is AES-GCM-SIV patent free? Does cryptopp provide AES-GCM-SIV library?
>
> On Feb 25, 2021, at 5:04 PM, Uri Blumenthal <[email protected]> wrote:
>
> What is your threat model?
>
> If you can guarantee that a combination of Key + Nonce will not repeat, 
> AES-GCM is a better choice.
>
> AES-GCM is a yesterday's achievement. A smarter and a more secure 
> altogether choice today is AES-GCM-SIV.
>
> CBC + HMAC is/was before yesterday.
>
> On Feb 25, 2021, at 14:39, Devharsh Trivedi <[email protected]> wrote:
>
> Which of the following is more secure?
> 1. AES-GCM (AEAD)
> 2. AES-CBC+HMAC (EtA)
>
> Ref.: https://www.cryptopp.com/wiki/Authenticated_Encryption
>
>
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