The expressobin board has 3 NICs, runs a dual-core Marvell 3700, which is ARMv8, and has a crypto-offload on the SoC.
It sells for $49 on Amazon. https://www.amazon.com/dp/B06Y3V2FBK
AES-GCM runs quite well on ARMv8:
https://www.rsaconference.com/writable/presentations/file_up...