Which of the following is not a dimension of e-commerce security provided by encryption? The answer is A. Availability. Encryption primarily provides confidentiality, integrity, and nonrepudiation. While encryption can indirectly support availability by protecting systems from attacks that could disrupt service, its main function is not to ensure system uptime. ?
The correct answer and explanation is :
Correct Answer: A. Availability
Explanation:
E-commerce security is critical in protecting data, transactions, and user trust. It is typically evaluated based on several core dimensions: confidentiality, integrity, authentication, nonrepudiation, and availability. Among these, encryption plays a crucial role—but not in all areas equally.
Encryption is a method of encoding data so that only authorized parties can read it. It is a powerful tool for ensuring:
- Confidentiality – Encryption ensures that information remains private and is only accessible to those with the proper decryption key. For example, customer payment details are encrypted to prevent unauthorized access during transmission.
- Integrity – Encryption supports data integrity by enabling the use of cryptographic hash functions or digital signatures. This ensures that data has not been altered in transit. If the received data doesn’t match its original hash, it indicates tampering.
- Nonrepudiation – Digital signatures, which rely on encryption, help ensure that a sender cannot deny the authenticity of their message. This is especially important in e-commerce, where transactions must be verifiable.
However, availability—the guarantee that systems and data are accessible when needed—is not directly provided by encryption. While encryption can help prevent some attacks (such as unauthorized access or data theft) that might lead to service outages, it does not itself keep systems running or ensure network uptime. Availability is more closely linked to system design, redundancy, backup protocols, and defense against denial-of-service (DoS) attacks.
In summary, the correct answer is A. Availability because encryption mainly ensures confidentiality, integrity, and nonrepudiation, not availability. Ensuring availability involves broader IT strategies and infrastructure resilience, beyond just the scope of encryption technologies.