JAVA RING
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Presented by : Etty Mathews
Class : C6
Roll no. : 7

JAVA RING
 A finger ring that contains a small microprocessor
 a sort of smart card that is wearable on a finger
 It’s a stainless steel ring called I-button.
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HISTORICAL BACKGROUND
 Dallas semiconductor Corp. Produced the first java ring
in 1989
 By 1990 this protocol was refined.
 Sun Microsystems Java ring was introduced at Java One
Conference in 1998.
 Earlier “touch memory”->“I-button”.
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It is a 1-millon transistors in a single chip.
 The i-button is microcomputer with a
powerful JVM (Java Virtual Machine) in the
steel can.
 I-button is preloaded with applets (Little
Application programs).
 Packaged module has a single electric
contact and a ground return.
Micro chip
WHAT IS JAVA RING
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 Lithium backed NVRAM offers high read/write speed
 Offers tamper resistance through instantaneous clearing.
 Data integrity and clock function maintained for more than
10 years.
 Tested at Celebration School, Orlando.
 Rings programmed with java applets.
 Operating System -E-commerce was designed
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SECURITY
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 Packaged in a 16 mm stainless steel can
 Protects from tampering like hard
knocks
 Rapid Zeroization occurs.
 Extreme temperature or voltage
causes Zeroization.
 A secret “Personal Identification
Number” is maintained.
Stainless-steel can

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COMPONENTS
 Java Virtual Machine (JVM)
 RAM
ROM
Real Time Clock
 I-button
Blue Dot Receptor
 1 –Wire Interface

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JAVA VIRTUAL MACHINE
(JVM)
 Its a piece of software, recognizes java language.
 Translates into byte code which can be used by the
system.
 Preloaded with small programs.

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RAM
 Java ring contains Non-Volatile Random Access
Memory(NVRAM).
 Data stored in this NVRAM.
 Provides r/w & tamper resistance through Zeroization.
 Existing 6Kb can be extended up to 128 Kb.
 Lithium energy preserves the complete state.
 I-buttons when not contact with receptor has zero executing
speed.

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ROM
 Contains 32 Kb of ROM
 E-Commerce & Java Virtual Machine
stored in the ROM.
 Not supposed to be altered by the user.
 Operating system handles operations in
i-button.

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REAL TIME CLOCK
 It gives the exact time of the day.
32 Kilohertz crystal oscillator operates the time
 Energy provided by lithium backup
 Inconsistent clock frequency makes it safer
 It runs for more than 10 years with the lithium energy.

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I-BUTTON
 Jewel of the java ring.
 Contains 1-million transistor processors in single
chip
I-button

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 ROM,NVRAM is bonded to barrier substrate.
 Barrier substrate and triple layer deny access to data.
This helps to keep private keys and confidential data.
Barrier Substrate
Triple layer

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 Figure shows a type of i-button
Lithium cell- for backup power
 Energy reservoir
 Quartz- for real time clock

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 Has single data contact on front
 Does reading, writing and power applied to the module
 Lid is the data contact.
 This contact is connected to
Chip inside.
 Each button has unique
Registration number.
Some have it on the ROM also
64-bit registration number

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 These numbers are globally unique.
No two i-buttons share the same number
 Needs physical contact with reader to function
 Button will stand up to harsh conditions.
 Zeroization occurs in case of
tampering.
Microchip in stainless-steel can

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TYPES OF I-BUTTON
 Memory i-button
Stores typed text ,digitized photos.
 Java Powered Cryptographic i-button
Stores encrypted and decrypted data in JVM.
 Themochron i-button
Tracks time ,temperature and calendar etc.

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BLUE DOT RECEPTOR
 Read /Write operation is done by RS232C serial port.
 Information is transferred through a momentary contact.
 Just touch the i-button to the receptor for data transfer.
 Has Speed up to 142Kbps.
Blue Dot
Receptor

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1-WIRE INTERFACE
 Used for the communication between PC & I-button.
 Has different communication speeds.
 Every device has unique serial number.
 Bus master issues a reset
 A specific Slave device is selected by unique serial number.
 All other devices are ignored
 After selection data are read and written into button.

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 Unique serial number is laser etched on to the chip.
64 bit registration number can be divided into three parts
 First 8 bit identify the family of i-button
Middle 48 bit identify the serial number
Last 8bit for error free reading

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TMEX RUNTIME ENVIRONMENT (TRTE)
 Its a software to interface i-button and computer.
 It installs all drivers and software needed for the i-button.
 It supports Windows 32 bit

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WORKING OF JAVA RING
 Java ring is programmed with applets that is specific for different users.
 Information transfers with a momentary contact at up to 142Kbps.
 Signet of the i-button is touched to the receptor.
 The receptor is cabled to the serial port which is attached to system.

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 Signet of i-button is pressed to the receptor.
 System connected performs the necessary functions as instructed.
 Both ring and receptor have the user profile.
 It checks both the profile
 If authentication satisfies, the door
Opens.
Opening door using java ring

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APPLICATIONS
 Store data such as secret code, credit card numbers etc.
 Can be affixed to badge ,watch ,keychain or ring.
 Can be used to store cash.
 Used to open doors.

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 To get the account balance.
 Used in cars for security
Java ring used to unlock door

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COMPARISON
 Can be compared to a credit/debit card.
 It has a magnetic strip which can be tampered.
 Transactions won’t be accepted.
 But i-button stand up the harsh conditions.

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ADVANTAGES
 Ideal where information need to travel with person.
Replace many password protected devices for financial
transactions.
 More secure than using passwords.
 Withstand harsh conditions.
 Provide authentication to users with the PIN.
 Data transferred by electric conductivity, no radio frequency
needed.

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DISADVANTAGES
 Java ring being most secure but receptor could be very
expensive.
 Many organization doesn’t know the existence of java ring.
 I-button have limited memory.
 Limited amount of information can be stored.

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CURRENT LIFE USAGE
 Used by the students at Celebration School,
Orlando.
 In Istanbul, people use for e-cash transactions
 In U.S also it is used

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CONCLUSION
 It is highly durable ( secure stainless steel packing)
It can be attached to a wide variety of accessories
like keychain etc.
In near future it will be widely used.

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