The implementation of the TEA symmetric encryption is not portable between all machine architectures. Explain why. How could a message encrypted using the TEA implementation be transmitted to decrypt it correctly on all other architectures?
What will be an ideal response?
Byte ordering is an issue. The algorithm as presented assumes that the 4 bytes in a 32-bit word are ordered the same at the sender (encrypter) and the receiver (decrypter). To make it work for all architectures, we would need to transmit messages in a network-standard byte order, and to re-order the bytes to suite the local architecture on receipt.
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Explain the difference between a nonrepeatable read and a phantom. Specifically, give an example of a schedule of the SQL statements of two transactions that illustrate the two cases. Specify an isolation level in each case.
What will be an ideal response?
The _________ facility enables communicating nodes to encrypt messages to prevent eavesdropping by third parties.
A) security B) key management C) authentication D) confidentiality
Internet communications are defined by a set of protocols called TCP/IP. What do TCP and IP stand for, and what is the role of each protocol in transmitting and receiving information?
What will be an ideal response?
Bidirectional transceivers utilize what technology to separate the data in each direction?
a. wavelength division multiplexing b. time division multiplexing c. frequency division multiplexing d. statistical time division multiplexing