GnuPG支持数据和通信的加密和签名，且以一个多功能的密钥管理系统和各种公钥目录的访问模块为特色。
GnuPG allows encrypting and signing your data and communication, and features a versatile key-management system and access modules for all kinds of public key directories.
在公钥密码系统中加密和解密算法是公开的，因此私钥存储管理成了公钥系统安全中薄弱的环节。
As the encryption algorithm and decryption algorithm are open to everyone, so the private key storage management becomes an insecure part in public key system.
论文主要通过研究改进椭圆曲线公钥密码学，设计实现了一个基于椭圆曲线的混合加密系统。
By studying and improving on ECC mainly, this article deals with the design and encryption algorithm implementation of a hybrid cryptosystem based on elliptic curve.
方案不仅支持系统内人员和设备的密钥管理、身份认证及公钥密码运算，而且还对加密密钥进行管理。
This scheme not only supports secret key management and identity authentication of personnel and equipment, but also constructs secret key management center and manages encrypted key of the system.
其结果是，“公钥基础结构”或PK I被证实不是加密数据的可靠系统，而且商业社会也已经注意到了这一点。
As a result, Public Key Institution (PKI) is proved to be the reliable system for encryption of data, which also draws attention of the commercial society.
实践表明，这种基于复合加密的公钥密码系统，算法的时间复杂度和空间复杂度并未受到影响，但其安全性较早期各同类系统更高、更易被用户采纳。
It is proved that this public key cryptosystem based on compound encryption has not been influenced on time complexity and space complexity, but it has more security t.
同时，基于身份加密的公钥密码系统中也存在着一些问题，如身份认证、私钥分发以及密钥托管等。
However, there are some problems in IBE such as identity authentication, private key distribution, key escrow and so on.
现今有三种认证系统：公钥基础设施(PKI)、基于标识的加密系统(IBE)和组合公钥系统(CPK)。
There are three authentication systems now: Public Key Infrastructure (PKI), Identity-Based Encryption (IBE) and Combined Public Key (CPK).
基于密码学的公钥技术提出了一种混合密钥加密系统，并加入认证技术，从而构建了一个网络环境下的虚拟光学信息安全系统模型。
A model of hybrid cryptosystem was proposed with the aid of public key techniques. Through this model, the solution of aforementioned issues may be found.
公钥加密密钥的分布问题在秘钥系统中一直是一个薄弱环节。
Public-key encryption The key distribution problem has always been the weak link in the secret-key systems.
公钥加密密钥的分布问题在秘钥系统中一直是一个薄弱环节。
Public-key encryption The key distribution problem has always been the weak link in the secret-key systems.
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