struct gcm_job void *src, *dst; u8 key[32]; u8 nonce[12]; u64 len; ;
AES-GCM is everywhere: TLS 1.3, IPsec, wireguard (with ChaPoly, but GCM is still common), and disk encryption. It provides both confidentiality (via AES-CTR) and authentication (via GHASH). However, GHASH is , which can be a bottleneck without carry-less multiplication instructions (PCLMULQDQ on x86, or PMULL on ARM). expn64v2gcm work
The "G" in GCM is for Galois Field multiplication (GHASH). This is mathematically intensive. Unlike general-purpose CPUs (which handle Galois field math slowly), the expn64v2 unit contains dedicated circuits. The "work" here involves: struct gcm_job void *src, *dst; u8 key[32]; u8
What comes after ? Early roadmaps show:
: Conversely, the protocol thrives on newer ARM-based instances, such as Graviton 4 , where hardware-level vector instructions can offset the computational cost of the 64-byte expansion. Implementation and Safety The "G" in GCM is for Galois Field multiplication (GHASH)