Java rings are wearable finger rings with microprocessors that function similarly to smart cards. They originated from Dallas Semiconductor's "touch memory" devices called i-buttons in 1989. Java rings contain an i-button microchip with memory, real-time clock, and a Java Virtual Machine that can run customized applets. They allow secure storage and transmission of user data and preferences for remote transactions, access control, and other applications while being durable, wearable devices. Potential disadvantages include high costs and limited memory capacity.

1. BY
D.AKSHAYA

2. WHAT IS A JAVA RING????
 A finger ring with a small
micro –processor – a sort
of smart card that is
wearable on a finger.

3. HISTORY…
 IN 1989-Dallas semiconductor corp produced the first
stainless-steel-encapsulated memory devices.
 They were called “touch memory devices later
renamed as “I buttons”
 i-buttons have one electrical contact at their surface
 Java rings were first issued at a conference registration

4. WHAT IS AN I-BUTTON??
 A micro-chip similar to
those in smart cards!
 Memory devices to store
data can be read &
written like floppies
 i-buttons with password
protected areas can even
store e-cash

6. Crypto i-buttons
 Does not have internal
power source
 Provides secure
transaction of
information between the
parties involved!
 i-buttons with
temperature sensors can
detect temperature for
transport,food storage
etc

7. I- BUTTONS

8. Potentials of java ring!!
 Data can be read from or written to it through a simple
RS232C serial port adapter
 The adapter supplies the power to perform the i/o
operations.
 When not connected to the adapter data is maintained
in NVRAM
 NVRAM unlike EEPROM can be erased & rewritten
without wear out.

10. JAVA RING FEATURES
1
• Durable & wearable
• Indestructible
2
• Has a real time clock
• Not heavy & clumsy
3
• 6k ROM,NVRAM!
• Has i-buttons in it!

11.  Has 6k memory to which authentication of the user
can be done!
 The java ring has an i-button that has a JVM which
runs applets that serve varied needs
 Once the user chooses his preference the data gets
stored and automatically the applet runs according to
the user’s preference

12. Advantages & disadvantages
 Helps in remote & safe
transactions
 Rugged & can be worn all
the time by the user
 10 years of durability
 Can be used even as a
key!!No more
passwords!!!
 Can be used anywhere in
the world

13. Disadvantages
 Provides real memory,
more power, and a capacity
for dynamic programming
 Can contain the
information about the user
 Cannot be stolen & when
an unauthorized person
tries to access the data
NVRAM automatically gets
erased!
 High investments
 Memory is small

14. Conclusion…
In near future the
computing devices
would only be so
intimate to humans!
The world of computing
will obviously be
mobile!!