ABSTRACT
This paper discusses mainly three parts: in the first place, treatise the kinds of computation about larger-number, study arithmetic of simple computation, and design program; secondly, applying the arithmetic above-mentioned to ECC; one more, outlook the development of computation about larger-number. To explain representation and memory about larger-number, the paper relates to the most familiar method----using array. Later, the paper introduces a sort of arithmetic for solving the problem of simple operation (plus, minus, multiply, divide, module, etc.) about larger-number, and compares three kinds of familiar arithmetic of larger-number's module-multiply (addition-arithmetic, estimate quotient arithmetic, Montgomery-arithmetic). Finally, making use of the application of larger-number' computation in ECC, I do some simple works.
[Keywords] ECC computation about larger-number arithmetic
