Middle portion of 3DES
Explain middle portion of the 3DES a decryption rather than the encryption?
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Decryption requires that the keys be applied in the reverse order:
P=Dk1 [Ek1 [P]]
This causes in the dramatic increase in the cryptographic strength. The use of DES results in the mapping which is not equivalent to the single DES encryption.
State requirements for the process of message authentication.
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Specify the steps used for preparing the envelope data MIME?
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plain the techniques that are used for the distribution of public key.
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State difference between the AES and Rijndael?
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Specify the number of keys required for the two people to communicate through a cipher?
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