AWS S3 (and a few compliant providers) offer immutable options, both in governance/compliance mode. Allegedly, compliance mode is unalterable by any account pe

AWS S3 (and a few compliant providers) offer immutable options, both in governance/compliance mode. Allegedly, compliance mode is unalterable by any account period, I guess the equivalent of the immutable attribute without an overriding account. I'm not immediately familiar with any literature on attacks on this feature, but I've also not searched hard; however, I know from my clients that it's an accepted form of WORM, and that cloud storages like S3 are considered in the same vein as tape when immutability is in play. I suppose it will be a case in the future that proves the efficacy of AWS/Azure/s3 providers, but for now, a lot of regulatory policies for 3-2-1 allow for such storage to fulfill the "2" part of the 3-2-1 rule.