加密的步骤

1) 计算N的有效位数tn（以字节数计），将最高位的零忽略掉，令tn1＝tn－1。比如N＝0x012A05，其有效位数tn＝5，tn1＝4。

2) 将明文数据A分割成tn1位（以字节数计）的块，每块看成一个大数，块数记为bn。从而，保证了每块都小于N。

3) 对A的每一块Ai进行Bi＝Ai^E MOD N运算。Bi就是密文数据的一块，将所有密文块合并起来，就得到了密文数据B。

-Encryption step 1) calculating the median N effective tn (in bytes) of the maximum zero-bit ignored, so that tn1 = tn-1. For example, N = 0x012A05, its effective median tn = 5, tn1 = 4. 2) to express the data A is separated into TN1 bit (in bytes) of the block, as a lump sum for each block, block number recorded as bn. Thus, to ensure that each block are less than N. 3) A 1 Ai for each Bi = Ai ^ E MOD N computing. Bi is a piece of ciphertext data of all ciphertext blocks combined together, we received ciphertext data B.