Explanation:
a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
Three characteristics of an ideal encrytion scheme are:
1. The encryption sheme should be strong: the algorithm is imprevious to direct attack and attempts are derived.
2. The encryption scheme should create unique ciphertext from the same plaintext for each key permutation, among other traits.
3. It should take at least millions of years to break ideal encryption scheme, based on mathematical predictions.
<em>Alan Shugart assigned David L. Noble to lead the development of "a reliable and inexpensive system for loading microcode into IBM System/370 mainframes" using a process called Initial Control Program Load (ICPL). </em>