Hello, I'd like to know the current status about the compatibility of TRIM (http://en.wikipedia.org/wiki/TRIM) for SSDs and dm-crypt. It is my understanding, that the current version of dm-crypt does not support trim operations and therefore SSDs that are encrypted with dm-crypt are not able to work as efficiently and fast as they would with working trim. One argument that is often heard in discussions about encryption and trim, is that trim enables an attacker to tell used blocks from empty blocks and that this might make an attack easier. However, I have never heard of a case, where the knowlege about the used blocks lead to a successfull attack of state-of-the-art crypto-algorithms and implementations. Of course the attacker might be able to make some guesses or assumptions about the content of the encrypted storage-device by analysing the distribution of used blocks, but in most scenarios this isn't an issue. Is the support of TRIM a feature that's planned for the future? If so, when? If not, why not? André _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
