What is the euclidean algorithm of 212 372 and 48?

The total key length for single DES is 56 bits. At the time, it was felt that was adequate so that someone could not easily guess what the key was. With automated approaches that has been shown to be...

Put the numbers in numerical order, pick the middle number. If there is an even number of numbers, pick the middle two, and find the mean of them. So in this case, the middle two numbers are 4.8, and...

4 - 8 = -4

Many thousands of them

144