Key size for Blowfish
Specify key size for the Blowfish?
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Blowfish takes use of key that ranges from the 32 bits to the 448 bits (one to fourteen 32-bit words). That key is used to produce the 18 32-bit sub keys and four 8*32 S-boxes consisting of total of 1024 32-bit entries. The total is 1042 32-bit values, or 4168 bytes.
Explain the term Encryption.
Specify any cryptographic keys which are used in PGP?
What is meant by the term S/MIME?
List significant design considerations for the stream cipher.
What are the types of attacks you think are addressed by message authentication? Why?
Specify the four categories of security threats?
Specify the services which are offered by the PGP services?
Explain why it is not desirable to reuse the stream cipher key?
Define: a) Mono-alphabetic cipher b) Playfair cipher c) Transposition cipher
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