problem loading x.509

x.509与PKI

公钥基础设施（Public Key Infrastructure，简称PKI）是利用公钥理论和技术建立的提供加密和数字签名等安全服务的基础设施。它以公开密钥密码算法为基础，结合对称密码算法、摘要算法等，通过数字签名、数字证书等技术来保证网络传输数据的机密性、完整性、不可否认性NO REPUDIATION以及身份鉴别等。 1.PKI的基础协议

PKI的基础协议有很多，如ITU-T X.680 Abstract Syntax Notation One（语法符号标准ASN.1）、ITU-T X.690 ASN.1 Encoding Rules（数据编码标准）和ITU-T X.500 系列标准等。而国际电信联盟ITU X.509协议，是PKI技术体系中应用最为广泛、也是最为基础的一个协议。它主要目的在于定义一个规范的数字证书格式，以便为基于X.500协议的目录服务提供一种认证手段。

一个标准的X.509数字证书是由用户公开密钥与用户标识符组成，此外还包括版本号、证书序列号、CA标识符、签名算法标识、签发者名称、证书有效期等。最初的数字证书X.509v1版1988年发布，1993年国际电信联盟ITU公布X.5

ICS 35.100.70 L79

中华人民共和国国家标准 GB/T XXXXX—200× 信息技术 安全技术 公钥基础设施

证书格式

Information Security Techniques—Public Key Infrastructure

Certificate Format

××××-××-××发布 ××××-××-××实施 国家质量技术监督局 发布

GB/T XXXXX—200×

目 次

前 言 ......................................................................... II

引 言 .......................................................................... III 1 范围 ............................................................................ 1 2 规范性引用文件 .................................................

Image definition evaluation functions for X-ray crystallography: A new perspective on the

phase problem

Hui LI*, Meng HE* and Ze ZHANG

Beijing University of Technology, Beijing 100124, People’s Republic of China

CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for

Nanoscience and Technology, Beijing 100190, People’s Republic of China

Zhejiang University, Hangzhou 310014, People’s Republic of China

Correspondence e-mail: huilicn@ mhe@

In memoriam of Ms. Guang-Lian Tian

05/March/2015

Abstract

The core them

Problem-Based Learning (PBL) describes a learning environment where problems drive the learning. That is, learning begins with a problem to be solved, and the problem is posed is such a way that students need to gain new knowledge before they can solve the

Problem-based Learning in Mathematics

Kyeong Ha RohApril 2003

Problem-Based Learning (PBL) describes a learning environment where problems drive the learning. That is, learning begins with a problem to be solved, and the problem is posed is such a way that students need to g

Problem-Based Learning (PBL) describes a learning environment where problems drive the learning. That is, learning begins with a problem to be solved, and the problem is posed is such a way that students need to gain new knowledge before they can solve the

Problem-based Learning in Mathematics

Kyeong Ha RohApril 2003

Problem-Based Learning (PBL) describes a learning environment where problems drive the learning. That is, learning begins with a problem to be solved, and the problem is posed is such a way that students need to g

Commercial& Industrial Qualification Report SummaryObjective: Kirin2E 4th Revision Freescale PN: MCF52235CAL60 Part Name: Kirin 2E

for ADC drop and Hitch problemCustomer Name(s): Various PN(s): Various Plan or Results: Revision#& Date: See Revision History in Notes)

Technology: 0.25um SGF Package: LQFP 112 20*20*1.4P0.65 (8255) Fab/ Assembly/ Final Test Sites: TSMC11/KLM/KLM Maskset#: M23E Rev#: 4 Die Size (in mm) W x L x T 7.150 x 6.940 mm

Design Engr: Phone#: Bishnoi Navin-B12218 Product Engr: Ad Azhar Muslim-B36772

　　2022年山东高考509分能上的黉舍及最低分：江苏第二师范学院最低分509分；昆明医科大学海源学院最低分509分；东北石油大学最低分509分；长春理工大学最低分509分。

2022山东高考509分能报哪些大学

　　阐明：因为报考批次差别，所以最低登科分数线也差别，下列表格只展示局部内容，如想要懂得全部内容请下载蝶变志愿APP检查。

　　注：本表格保举的院校名单只是一局部内容，仅作志愿参考。想要懂得全部名单，倡议下载蝶变志愿检查详细信息。

2022山东高考填报志愿注意事项
　　

　　因为本来一二本为两个批次时，即是有两次从命调剂的机遇。假如在一本没有从命调剂，因为分数、专业、身体条件不符被退档后，还可以等补录；补录不上，还可以等二本的登科。但一二本归并后，只有一个志愿组的登科，就即是只有一次“从命调剂”的机遇了，一旦不平从，从某个志愿院校中被退档，会间接掉到本科的补录，这个的风险

Cactus is an open source problem solving environment designed for scientists and engineers. Its modular structure facilitates parallel computation across dierent architectures and collaborative code development between dierent groups. The Cactus Code origi

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Recently suggested causal principal value and causal prescriptions for the "spurious singularity" in light-cone gauge theories are nothing but the different guises of usual Mandelstam-Leibbrandt prescription.

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991 gAu 41 1v780806/9ht-pe:hviXraCommentonprescriptionproblemin

light-conegauge

D.K.Park

DepartmentofPhysics,KyungNamUniversity,Masan,631-701Korea

Abstract

Recentlysuggestedcausalprincipalvalueandcausalprescriptionsforthe”spurioussingularity”inlight-conegaugetheoriesarenothingbutthedi erentguisesofusualMandelstam-Leibbrand

The covering Steiner tree problem is a common generalization of the k-MST and the group Steiner problems: Given an edge weighted graph, with subsets of vertices called the groups, and a requirement for each group which is an integer of value at most the si

An Approximation Algorithm for the Covering Steiner ProblemGoran Konjevod R. Ravi

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The covering Steiner tree problem is a common generalization of the k-MST and the group Steiner problems: Given an edge weighted graph, with subsets of vertices called the groups, and a requi