Question 28 - CISM discussion

Secure transmission protocols are network protocols that ensure the integrity and security of data transmitted across network connections. The specific network security protocol used depends on the type of protected data and network connection.Each protocol defines the techniques and procedures required to protect the network data from unauthorized or malicious attempts to read or exfiltrate information1. One of the most common threats to network data is eavesdropping, which is the interception and analysis of network traffic by an unauthorized third party.Eavesdropping can compromise the confidentiality, integrity, and availability of network data, and can lead to data breaches, identity theft, fraud, espionage, and sabotage2. Therefore, secure transmission protocols protect transactions from eavesdropping by using encryption, authentication, and integrity mechanisms to prevent unauthorized access and modification of network data. Encryption is the process of transforming data into an unreadable format using a secret key, so that only authorized parties can decrypt and access the data. Authentication is the process of verifying the identity and legitimacy of the parties involved in a network communication, using methods such as passwords, certificates, tokens, or biometrics.Integrity is the process of ensuring that the data has not been altered or corrupted during transmission, using methods such as checksums, hashes, or digital signatures3. Some examples of secure transmission protocols are:

Secure Sockets Layer (SSL) and Transport Layer Security (TLS), which are widely used protocols for securing web, email, and other application layer communications over the Internet. SSL and TLS use symmetric encryption, asymmetric encryption, and digital certificates to establish secure sessions between clients and servers, and to encrypt and authenticate the data exchanged.

Internet Protocol Security (IPsec), which is a protocol and algorithm suite that secures data transferred over public networks like the Internet. IPsec operates at the network layer and provides end-to-end security for IP packets. IPsec uses two main protocols: Authentication Header (AH), which provides data integrity and authentication, and Encapsulating Security Payload (ESP), which provides data confidentiality, integrity, and authentication. IPsec also uses two modes: transport mode, which protects the payload of IP packets, and tunnel mode, which protects the entire IP packet.

Secure Shell (SSH), which is a protocol that allows secure remote login and command execution over insecure networks. SSH uses encryption, authentication, and integrity to protect the data transmitted between a client and a server. SSH also supports port forwarding, which allows secure tunneling of other network services through SSH connections.

Reference=1: 6 Network Security Protocols You Should Know | Cato Networks2: Eavesdropping Attacks - an overview | ScienceDirect Topics3: Network Security Protocols - an overview | ScienceDirect Topics : SSL/TLS (Secure Sockets Layer/Transport Layer Security) - Definition : IPsec - Wikipedia : Secure Shell - Wikipedia