Ehealth: ICT toolbox

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Ehealth ICT toolbox

• Contents
• Iinternet (connectivity)
• Server based processing
• Client based processing
• Web services
• Encryption
• XML
• Databases
• References

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Ehealth ICT toolbox

• 1. Iinternet connectivity The Internet
  Protocol Suite
• Application Layer
• BGP DHCP DNS FTP GTP HTTP IMAP IRC
  Megaco MGCP NNTP NTP POP RIP RPC
  RTP RTSP SDP SIP SMTP SNMP SOAP SSH
  Telnet TLS/SSL XMPP
• Transport Layer
• TCP UDP DCCP SCTP RSVP ECN OSPF
• Internet Layer
• IP (IPv4, IPv6) ICMP ICMPv6 IGMP IPsec
• Link Layer
• ARP/InARP NDP Tunnels (L2TP) PPP Media
  Access Control (Ethernet, DSL, ISDN, FDDI)

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Ehealth ICT toolbox

• 1. Iinternet connectivity practical reality
  for (ambulatory medicine)
• media (OK but costs can be prohibitive)
• Fixed links (wired/fiber)
• Radio/satellite
• Wireless IP
• 3G wireless phone digital links

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Ehealth ICT toolbox

• 1. Iinternet toolbox
• Apache web server (A from LAMP Linux, Apache,
  Mysql, PhP)
• Microsoft offers a commercial alternative
• Http(s) (hypertext transfer protocol) static and
  dynamic web pages
• SOAP (Simple Object Access Protocol) web services
• Name system (DNS)
• IP routing
• IP security

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Ehealth ICT toolbox

• 1. Iinternet toolbox
• Linux
• Open Source
• Free and/or commercial licenses
• Red Hat / Debian / Ubuntu
• Stable, secure when well managed

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Ehealth ICT toolbox

• 1. Iinternet toolbox
• Apache web server
• Open Source
• Accepts multiple modules such as PHP

http//www.apache.org
PHP
Apache
Internet
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Ehealth ICT toolbox

• 2. Server based processing PHP
• P(ersonal) H(ome) P(age) PHP
• Program code inside a web page
• Read in by the Apache server
• Sent to the PHP module
• Executed
• Replaced by its result
• Sent to the web client

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Ehealth ICT toolbox

• 2. PHP example
• lthtmlgt
• ltbodygt
• lth1gtHow to escape to php mode lt/h1gt
• lt?php
• echo We are now in php mode!ltbrgt
• ?gt
• This is standard html mode ltbrgt
• lt/bodygt lt/htmlgt

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Ehealth ICT toolbox

• 2. PHP possibilities
• Database look-up, update,
• File merging into html
• Processing of forms input by users
• Generation of complex tables

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Ehealth ICT toolbox

• 3. Client based processing
• Javascript
• Java (applets, beans)
• Code is sent within the web page
• Execution within the users' browser
• Example checking completeness of a form
• That has to be filled in

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Ehealth ICT toolbox

• 3. Client based processing javascript example
• lt!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
• "http//www.w3.org/TR/html4/strict.dtd"gt
• lthtmlgt
• ltheadgtlttitlegtsimple pagelt/titlegtlt/headgt
• ltbodygt
• ltscript type"text/javascript"gt
• document.write('Hello World!')
• lt/scriptgt
• ltnoscriptgt
• Your browser either does not support JavaScript,
  or you have JavaScript turned off.
• lt/noscriptgt
• lt/bodygt
• lt/htmlgt

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Ehealth ICT toolbox

• 4. Web services
• SOAP (Simple Object Access Protocol)
• Machine to machine interaction
• Remote procedure calls
• Responses with or without data

Internet
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Ehealth ICT toolbox

• 5. Encryption
• Asymmetric (public key)
• Symmetric encryption with secret key
• Identification/authentication
• Digital signature

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Ehealth ICT toolbox

• 5. Encryption Public Key Infrastructure (PKI)
• Asymmetric system
• Key generation
• With a pass-phrase ? Private public key
• Encryption data public key of receiver
• Decryption encrypted data private key receiver

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Ehealth ICT toolbox

• 5. Encryption Public Key Infrastructure (PKI)
• Key generation

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Ehealth ICT toolbox

• 5. Encryption Public Key Infrastructure (PKI)

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Ehealth ICT toolbox

• 5. Encryption Symmetric encryption secret key

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Ehealth ICT toolbox

• 5. Symmetric encryption example

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Ehealth ICT toolbox

• 5. digital signatures
• Based on digital certificates
• Authentication certificate
• passive piece of text certifies an authority
  made a statement
• Signature certificate
• Operates as a key, together with hash code of
  document
• Results in digital signature of the document

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Ehealth ICT toolbox

• 6. XML
• see separate xml course documentation

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Ehealth ICT toolbox

• 7. Databases
• Relational model
• (Mysql, Oracle, Sybase)
• Non relational model
• Berkeley DB (hash table based)
• Amazon's simple DB
• Google's APP engine datastore
• Apache Couchdb

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Ehealth ICT toolbox

• 8. References
• ISOC (Internet Society) www.isoc.org
• W3C (World Wide Web Consortium) www.w3.org
• Javascript http//en.wikipedia.org/wiki/JavaScrip
  t
• MySQL PHP Web Database Tutorial
  http//www.blazonry.com/scripting/linksdb/
• Apache Software Foundation www.apache.org
• Java documentation and downloads
  http//java.sun.com
• Mysql http//www.mysql.com
• Couchdb http//couchdb.apache.org