What are secure payment systems?

A secure payment system (SPS) is a specialised infrastructure that ensures the safe processing and transmission of financial transactions, particularly in digital spaces and is important for mitigating risks such as fraud and unauthorised access.

Which components make a payment system secure?

As e-commerce and online transactions continue to grow in number and popularity, secure payment systems are necessary for preventing fraud, unauthorised access and other security threats.

Here are some key components and examples of secure payment systems:

Encryption

Encryption is a technique of transforming data into a code to prevent unauthorised access. This involves converting plain text data, such as credit card numbers, into a scrambled format called ciphertext using encryption keys. To convert the data back to its original form, a decryption process is applied using the corresponding decryption key.

Types of encryption

• Symmetric encryption: In symmetric encryption, both encryption and decryption use the same key. This is faster but requires secure key handling.
• Asymmetric encryption: In asymmetric encryption, there are two different keys – a public key for encryption and a private key for decryption. This allows the public key to be shared without compromising the data’s security.

How it’s used in secure payment systems

When a customer enters payment details online, the data is encrypted before being transmitted. This way, even if data is intercepted, it remains unreadable without the decryption key. Stored payment data, such as saved credit cards on e-commerce sites, can also be encrypted for added security.

Benefits of using encryption for businesses

• Data protection in transit: As data travels from the user to the server (or vice versa), encryption guarantees that if the data is intercepted, it will remain unreadable.
• Stored data security: Encrypted data, when stored, adds a layer of protection against unauthorised access or breaches, making raw data extraction more challenging.
• Regulatory compliance: Certain regulations, especially Payment Card Industry Security Standards (PCI DSS), require data encryption to safeguard customer information. Compliance helps businesses maintain their operational status and avoid sanctions.