Emerging Web Services Technology for

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Emerging Web Services Technology for
Collaborative e-Education (c-Education) _________
________________ ????????? Web Services
????????????? ?????????????????????????????? ????
???????????

• ??. ??. ????? ??????
• ??????? ????????
• ?????????????? ??????????????????
• ????????????????? ??????????????????????

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??????? Outline

• ??????????????????????????????????????????????????
  
• e-Education Development Levels (I-T-C)
• ??????????????? Transaction e-Education ????
  Digital Signature (PKI Public Key
  Infrastructure)
• Collaborative e-Education ???? Web Services
• ???????????????? ??? ??????????????????? ???? XML
• ??????????????????? ???? SOAP, ebXML Messaging
  Services
• ????????????????? ???? BPSS, CPP/CPA, UDDI,
  ebXML Registry Repository
• ????????????????????????????? ??? ????????
• ????

(Static) Information Web, Transaction Web, and
Collaborative Web
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????????????????????? ??????????????????????? e-Ed
ucation Development Levels
4
????????????? ??????????????????????????????
Standards for exchanging messaging services
between organizations
Potential Benefits
Challenge/Complexity
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???????????????????? Transaction Web ????
Digital Signature/PKI
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?.?.?. ???????????????????????? ?.?. 2544

• ?.?.?. ??????????????????????????????? ?.?.
  2544(????????????????????? ????????????????????
  ????)
• ????????????? ????????? (Trust Confidence)
• ???????????????
• ???????????????????????????
• ????????????????????????????
• ?????????????????????????? (PKI)
• ????????????????????
• ??????????????????????????

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??????????????? Security

• Authentication1 ????????? ??????
• Confidentiality2 ??????????? ??????
• Integrity ????????????????????
• Non-Repudiation ?????????????? ?????

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???????????????????????????????

• ?????????????? ???? ?????? ?????????? ?????? DNA
• ???????????? ???? ??????????? ???????????????????
  ???? ????????
• ????????????? ???? ???????? PIN

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????????????????????????????????????
?????????????? ????????????????????????????????
???????????????????????????? (??? ???
??????????????????????????????????????????????????
?)
DPLF
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Cryptography

• ?????????????????????
• ??? ??????????
• Cryptography
• Encryption Decryption

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???????????????????????? ??????
Integrity
?????????????????????? ???????????????? ????
?????????????? ??????????

• Symmetric-key Cryptography ????Secret-key
  Cryptography ????
• ?????????????????????????????????????????
• ????????????? ??? ??????????

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Symmetric-key Cryptography
????????????????? ??????????????? Web
Browser ?????????????????? ???????? SSL (Secure
Sockets Layer) ???????????????????????????????????
??? ???? ????????????????? ???????
Keyreceiver
?????? ???????
?????? ???????
Internet
Decryption
?????????????
?????????????
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SSL Secure Sockets Layer

• ?????????????????????????????????????????
  ??????????????
• 40 ??? (40-bit SSL) ????
• 128 ??? (128-bit SSL)
• ?????????????????????? ?????????????????
  (crack) ?????????? ??????????????

?????????????? 8 ??? ??????????????????????
28256 ??? ??????????????????????????????????????
???????????? ??? ???????????????? 128 ???
????????????????????????????? ??? 2128
???????????????????????????? ????????????????????
????????????? ?????????????????? 1019 ?? ?????
crack ????????????
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???? Symmetric-key Cryptography

• ????????????????????? Encryption?????????????????
  
• Digital Signature ??????????????????
• Confidentiality ????????????????????
  ????????????????????????????????
  ??????????????????????????? ?????

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???????????????????????? ???????

• Asymmetric-key Cryptography ????Public-key
  Cryptography
• ??????????????????????????????????? (???????????)
• ??????? ???????????? (Public Key) ???
• ???????????? ????????????????????????? (Private
  Key)
• ?????????????????????????????????????? ???
• ??????????????????????????????????????
• ????????????????????????????????????????????????

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???????????????????????? ???????

• Public-key Infrastructure ??????????????????????
  ?????? (Digital Signature)

Public Keysender
Original Message
Original Message
Internet
????????????? (???????????????????????????????????
??)
????????????? (?????????????????????????????)
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???????????????????????? ???????

• Public-key Infrastructure ??????????????????????
  ???????? (Confidentiality)

Private Key receiver
Original Message
Original Message
Internet
????????????? (??????????? Private Key
?????????????????????? ?????????????????????????)
????????????? (???????????????????????????????????
???????? ??????????????)
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Trusted Third Party Mechanism

• ?????????????????? (Certification
  Authority)???????????????????????????????
  ???????????????????????
• ???????????????????????????????????
• ???????????????????????????????????????
  (??????????????)
• ??????? ??? ??????????????????????????????
• ????????????????????????????????????????
  ???????????????????????????????????
• ???????????

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????????????? (Pilot project)

• Online Transaction Web with PKI
• Feasibility Study Pilot Projects
• Technical, Economical, Social/Usage Issues
• Pilot Projects
• Identification Card (Smart Card)
• Card Reader Devices
• Infrastructure Development
• Certificate Authority Servers
• Application Development Tools
• Appropriate Applications Development
• Cost/Benefit Analysis

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????????????? (Pilot project)

• ???????????????? MSIT 100 ??
• Smart Card (4 EU/Card)
• CA Server (Window Server)
• Development Platform (Web Base)

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????????????? (Pilot Project)

• Propose Applications
• Course Registration
• Online Payment
• e-Learning Online Examination

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Collaborative Web ???? ????????? Web Services
Sharable Content Services for Collaborative
e-Learning (c-Learning) Collaborative e-Education
(c-Education) Collaborative e-Government
Services (c-Government)
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e-Learning/e-Education
Dynamic (Flexible)

Simple Content
Complex Content

Static
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Students.gov (www.students.gov)
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Students.gov (www.students.gov)
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eCitizen (www.ecitizen.gov.sg)
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???????????????????? Web Services

Sharing knowledge Services
University A
Portal Services
University B
??????????????? ?
Collage C
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???????????????????? Web Services

(SIF)
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Sharable Content Model - SCORM

• Sharable Content Object Reference Model
• Defining a web-based learning Content
  Aggregation Model andRun-time Environment for
  learning objects
• Specifications enabling interoperability,
  accessibility, and reusability of Web-based
  learning content
• Creating one unified reference model(from the
  work of AICC, IMS, IEEE, ARIADNE,)
• ???????????????????? XML, Web Services

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??????? XML ?

• XML stands for EXtensible Markup Language
• XML is a markup language much like HTML.
• XML was designed to describe data.
• XML tags are not predefined in XML. You must
  
• define your own tags.
• XML is self describing.
• XML uses a DTD (Document Type Definition) or
• XML Schema to formally describe the
  data.

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??????? XML ?

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XML vs HTML
The main difference between XML and HTML XML is
not a replacement for HTML.XML and HTML were
designed with different goals XML was designed
to describe data and to focus on what data
is.HTML was designed to display data and to
focus on how data looks. HTML is about displaying
information, XML is about describing information

HTML
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????????????????? XML ??? XSL

• XML can keep data separated from your HTML
• XML can be used to store data inside HTML
  documents
• XML can be used as a format to exchange
  information
• XML can be used to store data in files or in
  databases

XSL
XML
ltltOutputgtgt
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??????????????????? XML ??????????????????????????
????
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??????????????????? XML ??????????????????????????
????
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??????? Web Services
??????????????????????

?????
??????
????????????
????????????
??????????????
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??????? Web Services

UDDI
SOAP
WSDL
INTERNET HTTP,SMTP,FTP, etc
????????????
????????????
SOAP/XML
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??????? Web Services

End-to-end web services solution
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??????????????????? Web Services eLeaning

• ???????????????????????????????/?????
  ??????????????????????????????????????????????????
  ??????
• ????????????????????????????????????????
  ??????????????????????????????????????????? XML
• ???????????????????????????? ???? Platform
• ???????????????????????????????????????????
• Synchronous and Asynchronous communication
• ???????????????????????? Internet

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??????????????????? Web Services eLeaning

• XML ?????? Web Services ??????????????????????
  ????????????????????????????????
• ??????????????????????????????????????????????
  ????? ??????????? (Low cost, More Open source)
• One-stop shopping for information provides a
  single access point

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???????????????????? Web Services
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???????????????????? Web Services
Computer-Based Testing Services

Server ???????????????????????????????????? ??????
?????? ????????????????????? ????????
Grading Calculations Services
Server ??????????????????????????? ????????
??????????????????? ??????????? ??????????????????
???????
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???????????????????? Web Services
Instructors/Students information Services (Portal)

University A
University B
???????????? ??????? ?
University C
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???????????????????? Web Services

LMS/ERP Knowledge Integration Services

• Service
• Create Student
• Assign Subscription
• Student Login
• Get Product Information
• Get Course Detail
• Get Tracking Information
• Edit Student
• Unassigned Subscription
• Add/Remove Student Group
• etc.

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???????????????????? Web Services

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????????????????????????????????????????????
On-line
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???????????????????? (Content)
???????
???????

????? ????????????????????????????????? (XML)
????????????? ??????????
??????????????????????????????????????
???????????????????????????
??????????????????????????????????
???????????????????? ???????
???????????????????????????
??????????????????????????????????
???????????
XML XSL
??????? ???????
HTML
????? ???????????????
????????????????????????? ???????
??????????????????????????????????????????????????
?? ??????????????????????????????????
??? ???????????????????????
?????????????????????????????
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?????? (Services)

• ??????????????????????????????
• Content Service
• Instructor finding Service
• Student Information Service
• etc.

???????????????????????????????? Web Services ?
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??????? ??????? (Persons and Knowledge)

• ???????????????
• (Knowledge Expert XML, Text)
• ??????????????????
• (Designer XSL, XHTML, Flash, Image etc)
• ??????????????/???????????????
• (Programmer Java, C, .NET, Delphi, PHP, etc)
• ????????????????????????
• (Web Services Search Engine UDDI)

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???????????????? ???? c-Education

• IMS Global Learning Consortium
• Advanced Distributed Learning (ADL)
• Schools Interoperability Framework (SIF)

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???? emerging enabling technology

• Enabling Secured Online Transactionwith PKI
  technology
• New Paradigm/Enabling Technology
• Structured Content (XML)
• Interoperable Services (SOAP, ebXML Messaging
  Services)
• Registry Repository (UDDI, ebXML Registry
  Repository)
• Business Processes (WSFL, WSFL)
• Emerging Interoperability Development Tools
• Compliance with SCORM Standard for learning
  management systems, content authoring tools
  vendors, instructional designers and content
  developers and training providers

• SCORM Sharable Content Object Reference Model

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Reference

• www.students.gov Education Web Portal ,USA
• www.golearn.gov Government Online Learning
  Center
• www.ecitizen.gov.sg One-stop for e-Government
  services, Singapore
• www.adlnet.org Advanced Distributed Learning
• www.imsglobal.org IMS Global Learning
  Consortium
• www.sifinfo.org Schools Interoperability
  Framework
• www.elementk.com KnowledgeHub, Web Services
  Product
• www.thejournal.com Education Journal
• www.w3.org XML, XHTML
• www.webservices.org Web Services
• www.ebxmlor.g UN/CEFACT-OASISs ebXML
  Initiative
• msit.cpe.ku.ac.th ???????????????
  ????????????????????? (????????)
• ????????????????? ??????????????????????????
  ??????????????????????

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??????????
Thank you