Introduction
Electromagnetic Cards are payment cards that use electromagnetic technology to store and transmit data. In banking and financial systems, these cards are commonly known as magnetic stripe cards. These cards store information in the form of magnetic data, which can be read by card-reading machines such as ATMs and POS (Point of Sale) terminals.
Meaning of Electromagnetic Cards
An Electromagnetic Card is a plastic card that has a magnetic stripe on the back side. This stripe contains encoded information about the cardholder and the account.
The stripe works on the principle of magnetism. It contains tiny magnetic particles that can be magnetized in different directions to represent data in binary form (0s and 1s). When the card is swiped in a card reader, the machine reads this magnetic information and processes the transaction.
In simple words, electromagnetic cards store data using magnetic technology and transmit that data when swiped.
Structure of Electromagnetic (Magnetic Stripe) Card
A magnetic stripe card consists of:
- Plastic body (PVC material)
- Magnetic stripe at the back
- Printed information on the front
- Card number
- Expiry date
- Cardholder name
- CVV number
The magnetic stripe is usually black or brown and located at the back of the card.
Tracks in Magnetic Stripe (Exam Important)
The magnetic stripe contains three tracks of data. Each track stores different types of information.
• Track 1 – Stores cardholder name and account number.
• Track 2 – Stores card number and expiry date.
• Track 3 – Rarely used in banking; may store additional data.
Most banking transactions mainly use Track 1 and Track 2.
Working of Electromagnetic Cards
When a customer swipes the card:
- The magnetic stripe passes through the card reader.
- The reader detects magnetic signals.
- These signals are converted into digital data.
- The POS or ATM sends the data to the bank server.
- The bank verifies:
- Card validity
- Account balance
- PIN (if required)
- Transaction is approved or declined.
The entire process happens within seconds through network connectivity.
Types of Electromagnetic Cards
Electromagnetic cards are mainly of the following types:
• Debit Cards
• Credit Cards
• ATM Cards
• Prepaid Cards
All these cards may use magnetic stripe technology for storing data.
Advantages of Electromagnetic Cards
Electromagnetic cards became popular because of the following benefits:
• Easy to use
• Low cost of production
• Fast transaction processing
• Widely accepted globally
• Simple technology
For many years, magnetic stripe cards were the backbone of electronic payments.
Disadvantages of Electromagnetic Cards
Despite their usefulness, electromagnetic cards have major limitations:
• Low security
• Data can be easily copied (Skimming)
• Physical wear and tear
• Sensitive to magnetic fields
• High risk of fraud
Magnetic stripe cards store static data, which means the same data is transmitted every time. This makes them vulnerable to fraud.
Security Risks – Skimming
One of the biggest problems with electromagnetic cards is skimming.
Skimming means illegally copying card data from the magnetic stripe using a skimming device. Fraudsters install small devices in ATMs or POS machines to copy card information.
After copying the data, they create duplicate cards and withdraw money fraudulently.
Because of this risk, banks shifted to EMV chip cards.
Difference Between Electromagnetic Card and EMV Chip Card
| Feature | Electromagnetic Card | EMV Chip Card |
|---|---|---|
| Technology | Magnetic Stripe | Microprocessor Chip |
| Security | Low | High |
| Data Type | Static | Dynamic |
| Fraud Risk | High | Low |
| Cost | Low | Higher |
EMV chip cards generate dynamic data for each transaction, which makes them more secure than magnetic stripe cards.
Role of RBI in India
In India, the Reserve Bank of India (RBI) directed banks to migrate from magnetic stripe cards to EMV chip-based cards to reduce fraud and improve security.
Earlier, most debit and credit cards in India were magnetic stripe cards. After increasing ATM fraud cases, RBI made chip-based cards mandatory for new card issuance.
However, some cards still carry magnetic stripes for international compatibility.
Use of Electromagnetic Cards in Banking System
Electromagnetic cards are used in:
• ATM withdrawals
• POS transactions
• Online payment (earlier systems)
• Access control systems
• Identity verification
In Core Banking System (CBS), when a card is used, the transaction request travels through network systems and updates the central database.
Limitations in Modern Banking
Due to increasing cybercrime and fraud:
- Magnetic stripe cards are being phased out.
- Contactless cards and chip cards are preferred.
- Tokenization and encryption technologies are used.
- Two-factor authentication is applied.
Still, understanding electromagnetic cards is important because many basic banking systems were built on this technology.
Conclusion
Electromagnetic Cards (Magnetic Stripe Cards) are traditional payment cards that store data using magnetic technology. They played a major role in the development of electronic banking and card-based payments.
However, due to security weaknesses such as skimming and data duplication, banks have largely shifted to chip-based cards. Even today, knowledge of electromagnetic cards is essential for understanding the evolution of banking technology and payment systems.