This presentation is about communication in ATM machine including protocols, network, encryption method, operating system of ATM, basic hardware, transaction process etc.

1. Communication in
Automatic Teller Machine (ATM)

2. Knowing in Automatic Teller Machine
(ATM)
A block diagram of an ATM

3. Hardware
ATM hardware that we often use in our life

4. Software
VS.

5. Software
Linux Penguin-OS on ATMs in Brazil
Bank of Philippine running Windows XP OS

6. State-Chart for One Transaction
Getting
Specifics
Sendingto
Bank
Handling
InvalidPin
Completing
Transaction
Printing
Receipt
Askingifcustomer
wantsanother
Cancelled
Specificsentered
Disapproved
(exceptinvalidPIN)
ApprovedInvalidPIN
Approved
Cancelled
Not
Cancelled
Toomany
InvalidPINs
Disapproved
(exceptinvalidPIN)
OrCancelled

7. ATM Transaction Processing
Provider
DataCenter
TANDEM CoreBranch
-GPRS
-3G
-ADSL
Encryption
Encryption
Encryption
ATMMachine
Encryption=3DESor AES-256bits
Branch=AES-256bits
ATMMachine=3DES
DisasterRecoverySite
Encryption Encryption
Encryption
NormalConnection
BackupConnection

8. Branch Transaction Processing
Provider1
DataCenter
TANDEM CoreBranch
Encryption
Encryption
Encryption=3DESor AES-256bits
Branch=AES-256bits
ATMMachine=3DES
DisasterRecoverySite
Encryption Encryption
Encryption
Branch
Provider2
MPLSL2
(Speed512-1024kbps)
MPLSL1
(Speed512-1024kbps)
NormalConnection
BackupConnection

9. DDN (Digital Data Network)
• Point to point
• Accuracy
• Fast
• Secure
• Backup Connection
• High ROI
• High cost (compare to other technologies)

10. DDN Applications
DSU/CSU
DSU/CSU
DSU/CSU
DSU/CSU
Router
PC
PC
PC
Mainframe
ATMMachine
Telepresence
DDN LAN

11. MPLS VPN (Multi Protocol Label
Switching Virtual Private Network)
• Point to point, Point to multi-point
• VPN
• Leverage existing ATM hardware
• Ultra fast forwarding
• IP Traffic Engineering
• Constraint-based Routing
• Controllable tunneling mechanism
• Voice/Video on IP
• QoS constraints
• Cost effective (compare to other technologies)

12. MPLS
Branch1
Branch6
Branch2
Branch3
Branch4
Branch5
MPLS VPN
MostbankinThailanduse
512-1024kbpslinksspeed.

13. DDN vs. MPLS
Feature DDN MPLS
Connection Type Point to Point Point to Point, Point to
Multi-Point
Disaster Recovery Link No Yes
VPN Ability No Yes
Price High* Low*
*Compare to other
technologies

14. 3DES (Triple Data Encryption Algorithm)
• Most widely used algorithm
• Pioneered by IBM
• It is symmetric crypto system
• Developed to protect sensitive, unclassified, US
government, Computer data.
• Used to provide authentication of electronic funds transfer
messages.

15. AES-256bits (Advanced Encryption
Standard)
• Designed simple
• Low memory cost
• High speed algorithm
• The key used to decrypt and encrypt is same
• Cipher text and plain text are same size
• Fast both in Software and Hardware

16. AES-256bits vs. 3DES**
Feature AES 3DES
Description Advanced
Encryption
Standard
Triple Data
Encryption
Standard
Timeline Official standard
since 2001
Standardized
1997
Type of algorithm Symmetric Symmetric
Key size (bits) 256 168
Speed High Low
Time to crack
(assume a
machine could try
255 key per
second - NIST)
149 trillion years 4.6 billon years
Resource
consumption
Low Medium
**“AES can encrypt data much faster than Triple-
DES, a DES enhancement which essentially

17. Q&A