Explain how bit-shifting, and related techniques, are used to hide data.?
What will be an ideal response?
Computer manufacturers' assembly languages can be used to create a low-level encryption program that changes the order of binary data, making the altered data unreadable when accessed with a text editor or word processor. These programs rearrange bits for each byte in a ?le. To secure a ?le containing sensitive or incriminating information, users run an assembler program (also called a "macro") on the ?le to scramble the bits. To access the ?le, they run another program that restores the scrambled bits to their original order. Some of these programs are still used today and can make it dif?cult for investigators to analyze data on a suspect drive. ?A related, and well-known, technique for hiding data is shifting bit patterns to alter the byte values of data. Bit-shifting changes data from readable code to data that looks like binary executable code.
You might also like to view...
When you call a ____________ method, it executes its code and returns without passing any value back to the program statement that called it.
a. void b. terminal c. value-returning d. private
Consider a hash table of size 500, and the hash function is i^3 mod 500. Which location is the key 1234 mapped to?
a. 404 b. 4 c. 500 d. 904
A _________ is the design of a set of characters.? A. font B. theme C. format D. script
Fill in the blank(s) with the appropriate word(s).
Divide the fractions by multiplying the dividend by the reciprocal of the divisor.
Divide 3/4 by 2/5