JAVA RINGDONE BY

ARUN PRABHA K CB.TECH(IT)

What is a Java Ring ?• Is a finger ring that contains a small microprocessor

with built in capabilities for the user.• 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.

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

Java Ring in its natural environment..

EVOLUTION• 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.

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

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.

iButton Structure

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.

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.

Cont…• 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

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

disAdvantages…• Cost of implementation is high• All machines should have appropriate iButton• iButton has limited process power and

memory

Conclusion…• The java powered cryptographic iButton named

java ring that lie in its capacity to interact with Internet applications to support strong remote authentication and remotely authorized financial transactions.

• The use of Java promotes compatibility with these applications by providing a common language for all application programming.

Applications• Access Control• Time and attendance• eCash• Thermochron Applications• Gaming Systems