JAVA RING

Presented ByLIJEESH.C

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.

MoreThe 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

JAVA RING

The Java Ring

Contains a tiny Java Virtual MachineImplements the Java Card 2.0 APIStores information in NVRAM (6K)Runs appletsIncludes microprocessor, memory, clock and battery

Java Ring in its natural environment..

HistoryThe 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.

ContdJava 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.

ContdThe 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.

WorkingWhenever 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.

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

ContdThe 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

ContdThe 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.

iButtonThe 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

MoreiButtons 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).

ContdUnlike 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

iButton Structure

1- Wire Interface

Blue Dot ReceptorThe 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.

Blue Dot Receptor..

ContdThe 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.

Opening doors

KEY FOB

Comparison with Smart CardsiButtons 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.

ApplicationsAccess ControlTime and attendanceeCashGaming Systems

AdvantagesA very easy and convenient way for users.More secure than using passwords.Portable.Ruggedness.Wearable.

ContdProvides 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

DisadvantagesParents and teachers will have less control over children and studentsLoss of privacy

THANK YOU

??!!