Types of Internet Security Protocols

Data transfer over the internet continues to grow, ensuring its security has become essential.

• Internet security protocols help in the security and integrity of data over the Internet.
• Many protocols exist and help in the security of data over the internet, such as SSL and TLS.

1. SSL Protocol

Secure Sockets Layer and it is an encryption-based Internet security protocol that protects the confidentiality and integrity of data.

• Ensures privacy and authenticity of data exchanged over the internet.
• Operates between the application layer and the transport layer in the network stack.
• Acts as the predecessor of modern TLS encryption protocols.
• Early versions of SSL had security flaws, leading to the adoption of TLS as its replacement.

2. TLS Protocol

Transport Layer Security is a standardized security protocol developed to safeguard digital communication by creating an encrypted channel between two systems.

• Developed as an improved and more secure replacement for SSL.
• Relies on a pseudo-random function to generate a master secret during session establishment.
• The master secret is further used to derive encryption and authentication keys.
• Supports secure communication between clients and servers, such as browsers and web applications.

3. S-HTTP

Secure HyperText Transfer Protocol is an extension of the HTTP protocol designed to provide secure communication over the web.

• Works at the application layer, making it closely integrated with HTTP operations.
• Protects web-based transactions such as online forms, database submissions, and internet communications.
• Provides authentication to verify the identity of communicating parties.
• Encrypts HTTP traffic to maintain confidentiality of transmitted data.
• Ensures message integrity through digital signing mechanisms.
• Operates on a message-by-message basis instead of securing the full session.

4. SET Protocol

Secure Electronic Transaction is a security protocol developed to protect electronic payments made through credit cards over the internet. It was designed to ensure confidentiality, authentication, and integrity during online financial transactions.

• Creates a protected communication channel between transaction participants.
• Ensures confidentiality so that sensitive payment details are disclosed only when required.
• Supports authentication to confirm the identities of all involved parties.
• Maintains data integrity to prevent unauthorized modification of transaction information.
• Operates as a transaction protocol, not as an independent payment mechanism.

Participants in the SET Protocol

• Cardholder: the customer using the credit card for purchase.
• Merchant: the seller providing goods or services.
• Issuer: the financial institution that issues the credit card.
• Acquirer: the bank that processes payments for the merchant.
• Payment Gateway: the system that authorizes and routes payment requests.
• Certification Authority: the trusted entity that issues digital certificates for authentication.

5. PEM Protocol

Privacy-Enhanced Mail is an email security protocol developed to provide secure communication over the internet.

• Primarily used for securing email transmission across networks.
• Supports encryption to keep message contents confidential.
• Provides nonrepudiation, ensuring that the sender cannot deny sending the message.
• Maintains message integrity by detecting unauthorized changes.
• Uses cryptographic methods to strengthen trust in email communication.
• Defined and standardized through four key RFC documents are RFC 1421, RFC 1422, RFC 1423 and RFC 1424.

6. PGP Protocol

Pretty Good Privacy is a widely used cryptographic protocol designed to secure digital communication and data storage. It provides strong privacy protection through encryption and supports authentication mechanisms that verify the sender’s identity.

• Easy to use and widely adopted for personal and professional security needs.
• Provides source code documentation, supporting transparency and trust.
• Meets essential cryptographic requirements for secure communication.
• Offers encryption to protect sensitive information from unauthorized access.
• Supports non-repudiation through digital signatures.
• Ensures message integrity by detecting alterations in transmitted data.
• More widely adopted and popular than the PEM protocol in practical use.