Briefly describe 3DES.
What will be an ideal response?
3DES (Triple DES) is the technique of encrypting plain text with DES and then taking the ciphertext and encrypting it again, with another DES key, and then taking the result and encrypting it yet again, with yet another DES key. The reader may ask why there is no such thing as Dexa DES, where the results are encrypted ten times. The answer is that each encryption takes time at both ends, and industry is unhappy to multiply the time spent encrypting and decrypting a document between three and ten times. Still, 3DES is faster than any secure asymmetric key algorithm.
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For a non-empty linked list, select the code that should appear in a function that adds a node to the end of the list. newPtr is a pointer to the new node to be added and lastPtr is a pointer to the current last node. Each node contains a pointer nextPtr.
a. lastPtr->nextPtr = newPtr; lastPtr = newPtr b. lastPtr = newPtr; lastPtr->nextPtr = newPtr c. newPtr->nextPtr = lastPtr; lastPtr = newPtr d. lastPtr = newPtr; newPtr->nextPtr = lastPtr
When you exit an Office app, if you have made changes to a file since the last time the file was saved, the app displays a dialog box asking if you want to save the changes you made to the file before it closes the app window.
Answer the following statement true (T) or false (F)
What is the best approach to establishing strong security with passwords?
A. Keep passwords short so you can remember them B. Use the same password for many sites C. Keep a written log of your passwords D. Use technology for managing passwords
Which of the following communicates with a satellite dish to provide high-speed Internet connections via satellite?
A. satellite transceiver B. satellite modem C. satellite receiver D. satellite dialer