Cipher Block Chaining MAC (CBC-MAC) is a method of building a message authentication code from a block-cipher.

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Using same key for encryption and ECBC-MAC k2

ECBC-MAC: $E_{k_2}(CBC-MAC_{k_1}(m))$ If we use same key for encryption (CTR or CFB) and k2 (end tag encryption) in ECBC-MAC in encrypt-than-MAC sheme, is it secure?
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CBC MAC and DES combined question?

Suppose that we want to develop a MAC scheme which is as secure as Triple-DES CBC-MAC and at the same time as efficient as Single-DES CBC-MAC. We come up with the following idea: Except the last ...
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NRPAD and FPAD padding schemes (Korean Seed?)

I've got an API spec that specifies NRPAD and FPAD as possible padding schemes. I see these being used together with the Korean SEED algorithm. The SEED specification however is void of any padding ...
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CBC-MAC, possible attack that violates computational resistance

received this question in an assignment and figured the wizards of crypto.stackexchange could give me some useful and relevant input. Suppose an attacker knows three message/CBC-MAC pairs $(M_1 , ...