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(a) You are provided with the following:
A. An RSA facility complete with public/private key pair B. A CBC (cipher block chaining) facility incorporating the IDEA block cipher C. A message digest facility employing the MD5 algorithm
(i) You are required to send a block of data of size 1 MByte through an insecure network to a recipient who knows the message digest algorithm you are using, your secret key in IDEA and your RSA public key. Explain how you would use your security facilities (each facility for one operation) to provide the security services of privacy, message integrity and source authentication.
(ii) How would you achieve the above if the RSA facility were not available?
(iii) Discuss the relative security strengths of your solutions to (i) and (ii)
(b) (i) Name five functions that should be provided by a public key infrastructure.
(ii) Is it possible to operate a public key security system without a public key infrastructure? Justify your answer.
(iii) Discuss the security impact of not having a public key infrastructure.
Explain use of RTP and RTCP Protocol?
Data Types Each data type of Table 1 must be sent according to the specifications below. [INT] Each value of this type is sent as the string representation of the corre
Length This is a 16 bit field that defines the total length of the user datagram, header plus data. This 16 bit can define a total length of a 0 to 65, 535 bytes.
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