Post acquisition, an audit by LSI reportedly discovered that the 256-bit AES native data encryption by SandForce SSD processors never was, and that the feature really just encrypted data with 128-bit AES. The problem has been resolved and a fix is in the works. LSI will share the fix with all SSD manufacturers with SandForce-based products, who could then release firmware updates to end-users.
Source: TheSSDReview