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Mobile Databases

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Title: Mobile Databases


1
Mobile Databases
  • Anywhere Access

2
Why Mobile Database?
  • Move to a more mobile workforce
  • Demand for access to information anywhere and
    anytime

3
Who Uses Mobile Databases?
  • People who work in remote locations like branch
    offices, on the road, or even out of their homes
    need to have access to their server databases
    through mobile devices like notebook computers,
    smart phones, and PDAs.

4
Who uses mobile data bases?
  • Traveling salespeople to download product
    information and upload orders.
  • The IMB of the Southern Baptist Convention uses
    them to access multimedia around the world when
    they speak at public relations events.
  • Scientist data from field trips around the
    world may be stored and accessed in search for
    new types of plants from a mobile base camp.

5
Some problems with mobile databases
  • Data inconsistency because the mobile device is
    not a constant part of the
    network.
  • Low battery life for many of the mobile devices
    that use mobile databases
  • Problems synchronizing data form mobile device
    with the server databse
  • Data loss if the mobile device has a major failure

6
Ways to solve these problems
  • Mobile database users must update with the server
    in a timely manner
  • Updates must be short so as to use as little
    battery life as possible
  • Broadcast data for data that may be used by many
    users at the same time
  • Again the mobile database users must update with
    the server in a timely manner
  • When synchronizing a database the tables must be
    created on the server database as well as the
    mobile device to avoid conflicts that may arise
    causing the synchronization to fail.

7
  • An important thing to ask yourself before you
    buy a mobile device for use as a mobile database
    is
  • What are the limitations of the device and the
    operating system that you choose to control the
    device?

8
Products
  • As databases go mobile on phones, PDAs, and
    handhelds, computer managers have found ways of
    how to fit them into the enterprise.
  • For instance to handle email, voice messaging and
    limited word processing.

9
What is the solution to mobile database?
  • Some of the products used by these companies
    include
  • Sybase Inc.s SQL Anywhere Studio 8
  • IBMs DB2everyplace 7 which offers
  • Powerful mobile relational database
  • Manageability
  • Integration with existing data sources
  • Microsoft SQL Server 2000 Windows CE edition and
    Oracle9i Lite

10
  • Microsoft SQL Server 2000 SP2
  • SQLBase from Gupta Technologies LLC of Redwood
    Shores, California,
  • HanDBase from DDH software Inc. of Lake Worth
    Florida

11
  • Sybase Adaptative Server Enterprise 12.5
  • MySQl 4.0

12
Security
  • Mobile data security problems
  • Interception of data transmissions
  • Unauthorized access
  • Administrative attacks
  • Lost devices

13
Security
  • Ways to solve security problems
  • Encrypting data or data communications
  • Password-protecting devices
  • User login mechanisms
  • Device security policies

14
Security
  • SSL - Secure Socket Layer
  • DESX Data Encryption Standard XORed
  • Variant of DES
  • Input plaintext is bitwise XORed with additional
    64 bits of key material
  • Output is bitwise XORed with 64 bits of key
    material

15
Security
16
Transport-layer Security
  • Transport-layer security is implemented using
    digital certificates and RSA encryption
    technology
  • Messages sent between client and server encrypted
    using 128-bit cipher

17
Questions
  • What are the two main encryption protocols used
    in mobile databases?
  • SSL
  • DESX

18
Questions
  • Which of the following is a problem with mobile
    databases?
  • Data inconsistency
  • Low battery life
  • Problems synchronizing data
  • All of the above
  • All of the above

19
Resources
  • www.mobile-dba.com/docs/MDBA-pres.pdf
  • www.rsasecurity/rsalabs/faq
  • www.x5.net/faqs/crypto/q74.html
  • www.sybase.com
  • www.pcmag.com
  • www.dbmsmag.com

20
Resources (cont.)
  • www.ignou.ac.in/virtualcampus/adit/course/cst302/b
    lock2/cst302-b12-ul.htm
  • www.gcn.com
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