RE: [PATCH v6 RESEND 5/5] crypto: LEA block cipher x86_64 optimization

[David Laight]

From: Dongsoo Lee
> Sent: 12 January 2024 02:29
> 
> For the x86_64 environment, we use AVX-512F/AVX2/SSE2 instructions.
> Since LEA uses 128-bit blocks of four 32-bit integers, for optimization,
> SSE2 encrypts 4 blocks, AVX2 encrypts 4/8 blocks, and AVX-512F encrypts
> 4/8/16 blocks at a time.
> 
> Our submission provides a optimized implementation of ECB, CBC
> decryption, CTR, and XTS cipher operation modes on x86_64 CPUs
> supporting.

Given you say in 0/0:

The LEA algorithm is a lightweight block cipher that processes data blocks of 128-bits and has three different key lengths, each with a different number of rounds:

Just how big is it ?
Doesn't look 'lightweight' to me.

	David

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)