Which of the following is the first operation in the algorithm used to decode data encrypted using AES? Change in the value of the bytes. Alternate the rows. Combine columns. Ensure that a circular key is included.

Are all the 56 bits of the DES key used an equal number of time in the Ki? Specify, for each of the Ki, which bits are not used.

using VBA and Excel Create a table with 6 products and their prices in cells A1:A6 and B1:B6 in a sheet called Catalogue in your Excel file. Use message boxes and input boxes to carry out the following tasks: - Ask the user which item they want to buy. - If the item is not available, give an appropriate error message, Otherwise, ask if they want to buy something else. - Repeat the above until the user does not want to buy any more items. other items. You should keep a running total of the amount spent, the number of items bought and the price of the cheapest item bought. - If there are more than three items in total, discount the final cost by the price of the cheapest item. - If today is a Wednesday, apply a 5% discount and display the final price in a message box entitled "Discount Wednesday", a warning icon and the OK button. Otherwise, display the final price in a box titled "Final Price". (Date() is the VBA equivalent of TODAY().

How can an Executable packer be used to make changes to the PE format?

en using gdb to debug your C code, the C code should be compiled with A.」 -Wall B. C. D. E. -O -C -g none of above flag.