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?
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?