Explanation/Reference: Explanation: Initial password assignment should be done discretely by the security administrator. Passwords should be changed often (e.g., every 30 days); however, changing should not be voluntary, it should be required by the system. Systems should not permit previous passwords to be used again. Old passwords may have been compromised and would thus permit unauthorized access. Passwords should not be displayed in any form.
Question 452
A new regulation in one country of a global organization has recently prohibited cross-border transfer of personal data. An IS auditor has been asked to determine the organization's level of exposure in the affected country. Which of the following would be MOST helpful in making this assessment?
Correct Answer: B
Question 453
Which of the following types of firewalls would BEST protect a network from an internet attack?
Correct Answer: A
A screened subnet firewall would provide the best protection. The screening router can be a commercial router or a node with routing capabilities and the ability to allow or avoid traffic between nets or nodes based on addresses, ports, protocols, interfaces, etc. Application-level gateways are mediators between two entities that want to communicate, also known as proxy gateways. The application level (proxy) works at the application level, not just at a package level. The screening controls atthe package level, addresses and ports, but does not see the contents of the package. A packet filtering router examines the header of every packet or data traveling between the internet and the corporate network.
Question 454
The practice of periodic secure code reviews is which type of control?
Correct Answer: A
Question 455
In which of the following payment mode, the payer creates payment transfer instructions, signs it digitally and sends it to issuer?
Correct Answer: C
Section: Information System Acquisition, Development and Implementation Explanation: Electronic systems are simplest of three payment models. The payer simply creates a payment transfer instructions, sign it digitally and send it to issuer. The issuer then verifies the signature on the request and performs the transfer. This type of systems requires payer to be on-line and not payee. For CISA exam you should know below information about payment systems There are two types of parties involved in all payment systems - the issuer and the user. An issuer is an entity that operates the payment service. An issuer holds the items that the payment represents. The user of the payment service performs two main functions - making payments and receiving payments - and therefore can be described as a payer or payee receptively. Electronic Money Model - The objective of electronic money systems is emulating physical cash. An issuer attempts to do this by creating digital certificates, which are then purchased by users who redeem them with the issuer at a later date. In the interim, certificates can be transferred among users to trade for goods or services. For the certificate to take on some of the attributes of physical cash, certain techniques are used so that when a certificate is deposited, the issuer can not determine the original withdrawer of the certificate. This provides an electronic certificate with unconditional uncertainty. Electronic Check Model - Electronic check system model real-world checks quite well and thus relatively simple to understand and implement. A users write an electronic check, which is digitally signed instruction to pay. This is transferred to another user, who then deposits the electronic check with the issuer. The issuer will verify payer's signature on the payment and transfer the fund from the payer's account to the payee's account. Electronic Transfer Model - Electronic systems are simplest of three payment models. The payer simply creates a payment transfer instructions, sign it digitally and send it to issuer. The issuer then verifies the signature on the request and performs the transfer. This type of systems requires payer to be on-line and not payee. The following were incorrect answers: Electronic Money Model - The objective of electronic money systems is emulating physical cash. An issuer attempts to do this by creating digital certificates, which are then purchased by users who redeem them with the issuer at a later date. In the interim, certificates can be transferred among users to trade for goods or services. For the certificate to take on some of the attributes of physical cash, certain techniques are used so that when a certificate is deposited, the issuer can not determine the original withdrawer of the certificate. This provides an electronic certificate with unconditional uncertainty. Electronic Check Model - Electronic check system model real-world checks quite well and thus relatively simple to understand and implement. A users write an electronic check, which is digitally signed instruction to pay. This is transferred to another user, who then deposits the electronic check with the issuer. The issuer will verify payer's signature on the payment and transfer the fund from the payer's account to the payee's account. Electronic Withdraw Model - Not a valid type of payment system. Reference: CISA review manual 2014 Page number 183
