The document describes a Java ring, which is a finger ring containing a microprocessor and Java virtual machine. The ring can run applets to enable various functions like attendance tracking, door access, and car security. It contains RAM, ROM, a real-time clock, and an iButton - a stainless steel can housing a computer chip with a unique address. The iButton allows the ring to communicate with a reader and host system. The ring provides security through its stainless casing and ability to require a PIN. It has applications in access control and thermochron usage while being portable and rugged.

1. By
Rajanivetha G

2. INTRODUCTION:
 Finger ring that contains a small microprocessor.
 Built-in capabilities for the user.
 It is extremely secured .
 It contains an inexpensive microprocessor in stainless
steel ibutton running a JVM and it is preloaded with
applet.

3. COMPONENTS:
 Java virtual machine
 RAM
 ROM
 Real time clock
 iButton
 Blue dot receptor

4. RAM & ROM :
RAM : 134kb
----> Program & data
ROM : 32kb
----> OS

5. iButton:
 iButton is a computer chip thick stainless steel can.
 Address etched onto its chip inside the can.
 Address can be used as a key or identifier.

6. iButton Structure:

7. TYPES OF iBUTTON:
 Memory iButton
 Java Powered Cryptographic iButton
 Thermochron iButton

8. Lay out of iButton:

10. Components for iButton
application :
 An iButton device
 A host system
 A reader/writer device to get information into and out
of the button.
 A layer of software.

11. Blue Dot Receptors:
 Provides a convenient pipeline for iButton - PC
communication.
 Information transfers with momentary touching java ring.

15. SECURITY:
 Armored with stainless steel for the hard knocks of
everyday use.
 Personal Identification Number(PIN)

16. WORKING:
 The Java Ring is in fact a Java smart card, which is
capable of running Java programs.
 A serial reader connects to a computer's serial port.

17. Contd..
 An applet written to run on the Java ring
follows a very simple structure.
 The methods are as follows:
 deselect -- another applet, or possibly this
one, is about to be selected
 install -- installs the applet
 process -- incoming APDUs arrive here
 select -- called when a select command is
received

18. APPLICATIONS:
 Attendance.
 Opening the door
 Security of car
 Thermochron Applications
 Access Control

20. ADVANTAGES:
 A very easy and convenient way for users.
 More secure than using passwords.
 Portable.
 Ruggedness.
 Wearable.
 Provides real memory

21. DISADVANTAGES:
 Cost of implementing is high.
 Limited amount of information is stored.
 The machine must support the same standard ibutton
reader interfaces.

22. CONCLUSION:
 Durable because of its rugged and secure stainless
packing.
 The iButton form factor permits attachment to a wide
variety of personal accessories that includes rings,
watchbands, key fobs, wallets, bracelets, and
necklaces, so the user can select a variation that suits
his or her lifestyle.