Isaca Updated CISA Exam Questions and Answers by florrie

 A checksum is classified as a detective control. A checksum is a mathematical value that is calculated from a data set and used to verify the integrity of the data. A checksum can detect if the data has been altered or corrupted during transmission or storage. A checksum does not prevent or correct the data corruption, but it alerts the user or system of the problem. Therefore, it is a detective control. A preventive control is a control that prevents an error or incident from occurring. A corrective control is a control that restores normal operations after an error or incident has occurred. Anadministrative control is a controlthat involves policies, procedures, standards, guidelines, or organizational structures. References: CISA Review Manual (Digital Version)1, page 439.

Access to the spreadsheet is given only to those who require access is the most important control for maintaining the security of data in the spreadsheet. An IS auditor should ensure that the principle of least privilege is applied to limit the access to sensitive financial data and prevent unauthorized disclosure, modification, or deletion. The other options are less important controls that may enhance the accuracy, availability, or integrity of data in the spreadsheet, but not its security. References:

CISA Review Manual (Digital Version), Chapter 6, Section 6.31

CISA Review Questions, Answers and Explanations Database, Question ID 210

Encryption is the process of transforming information into an unreadable form using a secret key, so that only authorized parties can access it. Encryption would protect the confidentiality of information sent in email messages, as it would prevent unauthorized parties from intercepting and reading the messages. Secure Hash Algorithm 1 (SHA-1) is a cryptographic hash function that produces a fixed-length output from an input. SHA-1 does not encrypt information, but rather verifies its integrity by detecting any changes or modifications. Digital signatures are electronic signatures that use encryption and hash functions to authenticate the identity of the sender and the integrity of the message. Digital signatures do not protect the confidentiality of information, but rather ensure its authenticity and non-repudiation. Digital certificates are electronic documents that contain the public key and identity information of an entity, such as a person, organization or device. Digital certificates are issued by trusted third parties called certificate authorities (CAs). Digital certificates do not protect the confidentiality of information, but rather enable secure communication and encryption by verifying the identity and public key of an entity. References:

[Encryption Definition]

[Secure Hash Algorithm 1 (SHA-1) Definition]

[Digital Signature Definition]

[Digital Certificate Definition]