Doesn't non-repudiation mean the opposite of what he is saying? I.e. isn't "being able to proof where something comes from or who did what" just repudiation?
isn't "being able to proof where something comes from or who did what" just repudiation?
No, "repudiation" is (in the relevant sense) denying responsibility for sending data or some other action. Non-repudiation is the property of a system that prevents (or, at least, makes more difficult) repudiation.
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Doesn't non-repudiation mean the opposite of what he is saying? I.e. isn't "being able to proof where something comes from or who did what" just repudiation?
No, "repudiation" is (in the relevant sense) denying responsibility for sending data or some other action. Non-repudiation is the property of a system that prevents (or, at least, makes more difficult) repudiation.
ah