In a conversation I would interpret a mention of military grade encryption as meant to defend against nation state actor adversaries who have theoretically unli

In a conversation I would interpret a mention of military grade encryption as meant to defend against nation state actor adversaries who have theoretically unlimited resources to mount an attack. In that sense, I would expect it to be much more stronger than financial grade or consumer grade encryption system where adversaries are less stronger. Certain attacks like supply chain attacks (factory, transport etc of hardware components) or special access attacks (Certificate authorities, BGP, DNS, ISPs etc) or social attacks (patsy or spy with MICE/RASCLS) that nation state actors can pull off which others cannot (without prohibitively significant effort or negative consequences). So, usually if someone says military grade, I would look at it as being resistant to even these threats. Of course, it is always about the system holistically and not just the AES, RSA, SHA-2 etc algorithms.