Java ring is a finger ring that contains a small microprocessor with built in capabilities for the user.Java ring is a sort of a smartcard that is wearable on a finger,a stainless-steel ring,16-millimeters (0.6 inches) in diameter.

1. JAVA RING

2. JAVA RING
Figure 1: prototype of stainless steel java ring

3. CONTENTS
•
INTRODUCTION
•
COMPONENTS
•
WORKING
•
SECURITY
•
APPLICATIONS
•
ADVANTAGES
•
DISADVANTAGES
•
CONCLUSION
•
REFERENCE

4. INTRODUCTION
• Java ring is a finger ring that contains a small
microprocessor with built in capabilities for the user.
• Java ring is a sort of a smartcard that is wearable on a
finger
• Java ring a stainless-steel ring,16-millimeters (0.6 inches)
in diameter.

5. CONTINUED…
• It contains an inexpensive microprocessor in a stainless
steel iButton which runs JVM and it is preloaded with applet.
• The java Ring is an extremely secure Java-Powered
electronic token.
• Java Ring have number of real-world application.

6. THE JAVA RING
• Contains a tiny Java Virtual Machine
• Implements the Java Card 2.0 API
• Stores information in NVRAM ,ROM
• Runs applets
• Includes microprocessor, memory, clock and battery

7. JAVA RING IN ITS NATURAL
ENVIRONMET..

8. COMPONENTS
• Java Virtual Machine (JVM)
•
RAM
•
ROM
•
real-time clock
•
iButton
•
Blue dot reciptor

9. JAVA VIRTUAL MACHINE
The java virtual machine is the piece of software that
recognizes the java language and translates the byte
Code.

11. RAM
• Java ring contains 134kb of non-volatile random
access memory .
• This non-volatile random access memory offers
high read/write speed.
• It also provides rapid zeroization.

12. ROM
• The java ring contains 32kb of ROM .
• Special kind of operating system called
e-commerce operating system is stored in the ROM

13. REAL TIME CLOCK
• Real time clock gives the exact time of the day and it can
run up to 10 years continuously .
• It is driven by a constant 32KHz crystal oscillator.
• In addition ,the frequency of the processor clock is
not constant ,ranges from 10-20MHz.
• This aspect prohibits hackers in obtaining the
information from the iButton.

14. i BUTTON

15. i BUTTON…
• The jewel of the java ring is the iButton.
• iButton is a computer chip enclosed in a thick stainless
steel can.
• It is originally called “touch memory devices they were
later renamed as “iButtons”.
• Java ring uses 1-wire protocol for communication
with the host and the iButton.

16. CONTINUED…
• The iButton is a mechanical packaging standard that
places a 1-Wire component inside a small stainless
steel "button" similar to a disk-shaped battery.
• Each iButton has a unique and unalterable address laser
attached onto its chip inside the can lid.
• The address can be used as a key or identifier for each
iButton.

17. i BUTTON STRUCTURE

18. BLUE DOT RECEPTOR
• The Blue Dot Receptors are iButton reader/probes that provide
convenient pipeline into the PC for iButton-to-PC
communication.
• The receptor's cable connects to a USB, serial, or parallel-port
1-Wire adapter, whichever type of port you wish to use.
• The receptor itself easily affixes to any accessible spot on
the front of the PC.
a

19. BLUE DOT RECEPTOR…

20. CONTINUED…
• Key features:
• It has a coiled cable for connecting iButtons to 1-Wire
networks .
• Adhesive pad for mounting on objects.
• Supports for up to two iButtons at once.
• Can be used with any Dallas Semiconductor port
adapter

21. WORKING
• Java Ring is programmed with the applets and
the programming is done according to our application
• Whenever the user pushes his ring on a ring reader(Blue
Dot Receptor), the corresponding application will take
place.

22. OPENING DOORS

23. Figure 5.2: Working process of Java Ring(Source: Java Card Technology

24. CONTINUED…
• 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.
• The Blue Dot receptor is cabled to a 1-Wire adapter that is
attached to a spare PC port. 1-Wire adapters exist for USB,
serial, and parallel ports.

25. SECURITY
• The barrier substrate and the triple-layer metal construction
techniques employed in the silicon fabrication effectively deny
unauthorized access to the data stored in the NVRAM. If any
attempt is made to penetrate these barriers, the NVRAM data is
immediately erased.
• Java rings are authorized through Personal Identification
Numbers
(PINs) so that no one can steal a person's ring and use that ring.

26. APPLICATIONS
• The java ring can be used to hold secret codes,
credit cards numbers, driver license, other wallet
contents, and even some electronic cash.
•
Its greatest promise appears to lie in its capacity to
interact with Internet applications to support strong
remote authentication and remotely authorized financial
transactions.

27. CONTINUED…
• For opening the door
• E-banking application
• Logging in your PC
• Providing security in your car
• Used to fill forms

28. ADVANTAGES
• The Java Rings are very easy and convenient for
users.
• It can function between -40C to+70C and in much
harsher environment.
• It has higher durability.

29. CONTINUED…
• Easier for administrator to maintain the security
infrastructure.
• Provides real memory, more power, and a capacity
for dynamic programming .
• Provides authentication to user which is crucial for many
applications.

30. DISADVANTAGES
• The cost of implementing the system is high.
• It needs a high level tools and method in order to
program
application efficently, reliabily,securily.
• iButton has a limited processor capacity and memory , which
means an individual might need to carry more
Java Ring.
than one

31. CONCLUSION
• Although Java Rings aren't widely used yet, such rings or
similar devices could have a number of real-world
applications, such as starting your car and automatically
adjust to your preferences.
•
The key issue about a wearable computer (java ring) is not
whether it is a ring or another form factor: the deciding point is
that you will always have it with you.

32. REFERENCES
• http://www.javaworld.com/
• http://www.people.uchicago.edu/
• http://www.electronics.howstuffworks.com

33. abhi.globalistic@gmail.com