How I encrypt my data in the cloud

Re:How I encrypt my data in the cloud by kochthesecond on Saturday July 06, 2019 @05:16AM (#20368751)

if you encrypt in a way that enables the service to do dedupe, you are either reusing IVs and encryption keys across items (bad) and leaking information that two items are the same item.

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Re:How I encrypt my data in the cloud by viraptor on Saturday July 06, 2019 @08:14AM (#20369253)

You must not reuse IV between different blocks, but that does not stop you from using the same IV for the same block. Yes, you leak information about matching blocks - it's up to your use case whether you care about it.

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Re:How I encrypt my data in the cloud by kochthesecond on Wednesday July 10, 2019 @04:57PM (#20406479)

Yes, sorry I was imprecise. I meant reusing IVs for equal blocks only, to be able to see duplicate data.

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