Assessor_New_V4 Exam Dumps : Assessor_New_V4 Exam

Hashing is a form of one-way encryption that transforms a data element into a unique fixed-size data element (hash value) without a way to get the original data element from the hash value1. Truncation is a method of rendering the full PAN unreadable by permanently removing a segment of the PAN data2. PCI DSS Requirement 3.4 states that entities must render the PAN unreadable wherever it is stored, using any of the following methods: one-way hashes based on strong cryptography, truncation, index tokens and pads, or strong cryptography with associated key-management processes and procedures3. However, PCI DSS Requirement 3.4e also states that if hashed and truncated versions of the same PAN are present in the environment, additional controls must be in place to ensure that the hashed and truncated versions cannot be correlated to reconstruct the original PAN3. This is because if an attacker obtains both the hashed and truncated versions of the same PAN, they may be able to use a brute-force or dictionary attack to guess the original PAN by hashing and truncating different PAN values until they find a match4. Therefore, the correct answer is option A.

The other options are not true regarding the presence of both hashed and truncated versions of the same PAN in an environment. Option B is not true because PCI DSS does not require the hashed version of the PAN to be also truncated, although it is a recommended best practice to further reduce the risk of exposing the original PAN5. Option C is not true because PCI DSS does not require the hashed and truncated versions to be correlated, as this would defeat the purpose of rendering the PAN unreadable and increase the risk of exposing the original PAN. Option D is not true because PCI DSS does not prohibit the presence of both hashed and truncated versions of the same PAN in the same environment, as long as additional controls are in place to prevent the reconstruction of the original PAN. References:

• Protect hashed CardHolder Data according to PCI DSS 3.4 - Advantio
• PCI DSS Truncation Rules and Guidelines - Truvantis
• PCI DSS v3.2.1
• Storing Card Numbers using hashed and truncated version of PAN
• pci dss - Credit card data security - hashing, truncation and encryption - Information Security Stack Exchange

According to the PCI DSS v3.2.1 Quick Reference Guide1, track equivalent data on the chip of a payment card is sensitive authentication data, which means it can be used to authenticate a cardholder or a transaction, but it should not be stored or transmitted by merchants after authorization if encrypted. This is one of the requirements for preventing unauthorized access to sensitive authentication data.

According to the PCI DSS v3.2.1 Quick Reference Guide1, the same AOC template is used for ROCs and SAQs. This is one of the requirements for ensuring consistency and accuracy in ROCs and SAQs.