利用数据生成技术，提出生成锁P <G ,X, X´>的概念和由P <G ,X, X´>构成的中央加密系统。这些系统是：生成锁P <G ,X, X´>与单齿中央加密系统，生成锁P <G ,X, X´>与多齿中央加密系统。给出单齿加密-解密算法，多齿加密-解密算法，多齿静态加密-解密算法，多齿动态加密-解密算法，中央加密系统的结构特性。研究指出：任意两个秘密通讯的双方A和B，它们各自选择无规则分布的正整数集合X_A={x₁，x₂，…，x_n}，X_B={x₁，x₂，…，x_m}，m,n≥4，X_A≠X_B，利用P <G ,X, X´>完成双方之间的秘密通讯。研究结果表明，所提出的方法具有良好的应用性，安全性。

The conception of the generating lock  P <G ,X, X´> and the central encrypting system composed of P<_{G ,X, X´}>with data generating technology are proposed in this paper^[3〜6]. These systems include the generating lock P<G ,X, X´> and single-tooth central encrypting system, and the generating lock P <G ,X, X´> and multi-tooth central encrypting system. The single-tooth encrypting-decrypting algorithm multi-tooth encrypting-decrypting algorithm, multi-tooth static encrypting-decrypting algorithm, multi-tooth dynamic encrypting-decrypting algorithm as well as the structure character of central encrypting system are provided. The paper points out that arbitrary two persons A and B can choose irregular distributed positive integer sets, X_A={x₁, x₂, …，x_n}, X_B ={x₁,x₂,…x_m}, m≥4, n≥4, X_A≠X_B , respectively and complete their secret communication with P < G, X, X´>. The experiment result shows that the method proposed has good application character and security character.