1. JAVA RING
Presented By
LIJEESH.C

2. What is a Java Ring ?...
Is a finger ring that contains a small
microprocessor.
Is a sort of a smartcard that is wearable on
a finger.
Is in fact a java smart card based on Java
Virtual Machine that was proposed as the
Java card 2.0.

3. More…
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 system

4. JAVA RING

5. The Java Ring
Contains a tiny Java Virtual Machine
Implements the Java Card 2.0 API
Stores information in NVRAM (6K)
Runs applets
Includes microprocessor, memory, clock
and battery

6. Java Ring in its natural
environment..

7. History…
The java ring, which is powered by Java
card was introduced at Sun Microsystems's
JavaOne Conference, in March 1998.
It was developed by Dallas Semiconductor.
Workstations at the conference had "ring
readers" installed on them that downloaded
information about the user from the
conference registration system.
This information was then used to enable a
number of personalized services.

8. Contd…
Java ring has been tested at Celebration
School, an innovative K-12 school, just
outside Orlando, FL. The rings are given to
students and have been programmed to;
store electronic cash to pay for lunches
automatically unlock doors
take attendance
store medical information
allow students to check out books.
Students simply press the signet of their
Java Ring, and it performs the desired
function.

9. Contd…
The rings given to students are
programmed with Java applets that
communicate with host applications
on networked systems. Applets are
small applications that are designed
to be run within another application.
The Java Ring is snapped into a
reader, called a Blue Dot receptor, to
allow communication between a host
system and the Java Ring.

10. Working…
Whenever the user pushes his ring on a
ring reader(Blue Dot Receptor), the
corresponding application will take place.
The jewel of the java ring is the iButton.
iButton is a computer chip enclosed in a
thick stainless steel can.
It uses 1-wire protocol for communication
with the host and the iButton.

11. Contd…
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. The Blue Dot receptor and 1-
Wire Adapter are inexpensive

12. Contd…
The Java Card 2.0 architecture has taken
client/server architectures to a new place --
one where the "server" is a small piece of
software on an extremely small system,
and the client is a potentially huge piece of
software on a potentially much larger
system.
The network protocol is encapsulated in
packets that are called application
program data units, or APDUs for short

13. Contd…
The smart card runtime code gets the first
crack at decoding the APDUs as they
arrive on the serial interface.
Further, there are predefined APDUs that
tell the runtime to select an applet, delete
applets, load applets, and so on.

14. iButton
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 etched onto
its chip inside the can.
The address can be used as a key or
identifier for each iButton.

15. iButton

16. More…
iButtons are connected to 1-Wire bus
systems by means of a socket with
contacts which touch the "lid" and "base" of
the canister.
The connection can be fleeting, similar to
swiping a credit card through a reader.
Semi-permanent connections are possible
with a different socket type. (The iButton
clips into it, but is easily removed).

17. Contd…
Unlike electrically erasable programmable
read-only memory (EEPROM), the NVRAM
iButton memory can be erased and
rewritten as often as necessary without
wearing out.
It can also be erased or rewritten at the
high speeds typical of complementary
metal oxide semiconductor (CMOS)
memory, without requiring the time-
consuming programming of EEPROM

18. iButton Structure

19. 1- Wire Interface

20. Blue Dot Receptor…
The Blue Dot Receptors are iButton
reader/probes that provide a
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.

21. Blue Dot Receptor..

22. Contd…
The user can elect a quick
information transfer with a momentary
touch of the iButton to the Blue Dot.
Each receptor contains two Blue Dots
to accommodate instances where
multiple iButtons are required for a
transaction.

23. Opening doors…

24. KEY FOB

25. Comparison with Smart
Cards…
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.

26. Applications…
Access Control
Time and attendance
eCash
Gaming Systems

27. Advantages…
A very easy and convenient way for
users.
More secure than using passwords.
Portable.
Ruggedness.
Wearable.

28. Contd…
Provides authentication to users
which is crucial for many applications.
Easier for administrator to maintain
the security infrastructure.
Provides real memory, more power,
and a capacity for dynamic
programming

29. Disadvantages…
Parents and teachers will have less
control over children and students
Loss of privacy

30. THANK YOU

31. ??!!