Anka Disk Engine is closely integrated with VM Policy and performs on the fly encryption (OTFE) of all information passed to/from disk image. Encryption uses cryptography data from the associated policy, so it’s not possible to use (decode) encrypted drive with another policy or without policy itself. This robustly protects encrypted VMs from policy replacement attacks.
OTFE is not turned on by default with
anka modify VM set policy command. It can be turned on with
anka modify VM set hard-drive --enc [aes-128|aes-192|aes-256|none] command.
Currently aes-ecb encryption algorithm is supported. 128 bit encryption is more than enough to protect VM from unsolicited access/modifications, but for some applications aes-ecb-256 could be needed.
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