为了消除传统的纯数字加密技术(PNCT)保密性的缺陷，即泄密性、期限性和死密性，提出了一种新的基于变进数(VCN)智能特性的PNCT。传统的PNCT生成的准密码数均是恒进数(FCN)，其变化规则(FCR)的单一性、机械性和难记性，造成其保密性缺陷。VCN则是FCN的拓展，是一种新的更为广义概念上的数，但其变化规则(VCR)的复杂性、智能性和灵活性，可以克服FCN的保密性缺陷。

To overcome 3 shortcomings of the traditional PNCT (pure numerals ciphering technology) of that, properties of the divulging a secret, the allotted time and the dead secrets. This paper gives a novel ciphering technique based on specific properties of intelligent VCN (variable carrying numbers). All allowed cipher numbers are FCN (fixed carrying numbers), in the traditional PNCT, and their changing rules of FCN are both very simple, mechanism and too difficult to be remembered, so that they make the mentioned shortcomings of being sure secrecy in the course of nature. The VCN are extension of the FCN, which are also a new concept of numbers in a broad sense, but their complex,intelligence and flexibility in changing rules are just to overcome the 3 shortcomings of PNCT in FCN.