Re: Provable secure Authenticated Encryption scheme

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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