This document discusses the Java Ring, which is a finger ring containing a microprocessor, memory, and Java virtual machine. It can run applets to store user information and perform functions when touched to a receptor. The Java Ring is made of stainless steel and is more durable than smart cards. It has various applications including banking, security, login, and storage of usernames and passwords. The document provides an introduction, history, components, working, comparison to smart cards, applications, and conclusions about the Java Ring.

1. JAVA RING
Kaushik Banerjee
MCA Final year
(6th SEM)
1303214028

2. Contents :-
 Introduction
 History
 Components in java ring
 Working
 Comparison with smart cards
 Applications
 Conclusion
 reference

3. INTRODUCTION
 A Java Ring is a finger ring that contains a small microprocessor with built-in capabilities for the user.
 It contains an inexpensive microprocessor in a stainless steel ibutton running a JVM and it is preloaded
with applet.
 The Java Ring is an extremely secure Java-powered electronic token .
 The Java Ring is a stainless-steel ring, 16-millimeters (0.6 inches) in diameter, that houses a 1-million-
transistor processor, called an ibutton.
 The ring has 134 KB of RAM, 32 KB of ROM, a real-time clock and a Java virtual machine, which is a
piece of software that recognizes the Java language and translates it for the user's computer

4. JAVA RING
Contains a tiny java virtual machine.
Implements the Java Card 2.0 API.
Store information in Lithium Backed NVRAM(6k)
offers high Read/Write speed.
Runs Applets.
Include microprocessor , Memory , Clock and Battery.
It is an extremely secure java-powered electronic token
with a continuously running, unalterable real time clock
and rugged packaging , suitable for many application.
The Ring has 132 KB of RAM,32 KB of ROM.

5. History
 In the summer of 1989, Dallas Semiconductor Corp. produced the first
stainless-steel-encapsulated memory device called iButton.
 IButton is the main component of java ring.
 Java Ring was introduced at their Java One Conference in March 1998.
 By 1990,this protocol had been refined and employed in a variety of self-
contained memory devices. Originally called “Touch memory” devices , they
were later renamed “iButtons”.

6. Components In Java Ring
JVM
RAM
ROM
Real time clock
Ibutton
Button Dot Receptor
One wire interface

7. Architecture of iButton

8. Blue Dot Receptor
Information is transferred between iButton and a PC
through Blue Dot Receptor.
You simply touch iButton to a Blue Dot receptor.
These receptor uses 1-wire communication protocol for
data transfer.
Has speed up to 142 kbps.
Read/Write operation done by RS232C serial port.
Information is transferred through the momentary
contact.

9. Working
 Java ring is programmed with the applets according to our application.
 For specific class of user specific java applets is preloaded in to the java ring.
 All the information of the user is stored in the java ring.
 User simply presses the signet of the java ring against the “blue dot” receptor and the system
connected to the receptor performs the function that the applet instructs to do.
 Information is transferred between your iButton and a PC with a momentary contact at up to
142kbps.
 You simply touch your iButton to a Blue Dot receptor or other iButton probe, which is
connected to a PC.

10.  iButtons have an advantage over conventional smart cards in term of durability and longevity.
 iButtons are rugged enough to withstand harsh environments.
 iButton uses java as a common programming language.
Comparison with smart card

11. Applications
 E-bank application.
 Providing security in your car.
 Login into your pc.
 Storage vault for user names and
passwords.
 E-cash transactions(like in Istanbul).
 Used by the students at celebration
School ,Orlando for lunch.
 Digital photo-id and fingerprint
biometrics.

12. Conclusion
Highly durable.
Java ring is highly durable because of its rugged and secure stainless packing. It is used in
personal computing.
With its stainless steel armor, it offers the most durable packaging for a class of products
that likely will suffer heavy use and abuse as personal possessions.
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.
In near future , it will be widely used.

13. References
 Digital Jewellery : An approach to protect jewellery
- by Mohit Popat, Prof P.A.Bhalge.
 Dallas semiconductor ibutton website http://www.ibutton .com
 http://people.cs.uchicago.edu