Question: can you give step wise proof : i) Security proof of encrypted CBC-MAC (ECBC) for arbitrary length message

can you give step wise proof : i) Security proof of encrypted CBC-MAC (ECBC) for arbitrary length message

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can you give step wise proof : i) Security proof of encrypted CBC-MAC with arbitrary length message ii) for fixed length 'l' message 'm' the basic CBC-MAC is Unforgeable CMA secure

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