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1answer
158 views

Is CBC mode encryption vulnerable to a reordering attack?

I know that, if CBC-MAC is used in such a way that the tag is the concatenation of all the blocks' outputs (and not just the last one), it's insecure under CPA for the simplest case of 2 blocks ...
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201 views

Is there a way to break this encryption?

I was wondering about making up a simple system to encrypt a file: ...