PCI DSS Practice Question: When using hashing to render PANs unreadable, what additional... | CyberCertPrep
PCI SSCPCI DSSCardholder DataEASYFree question
When using hashing to render PANs unreadable, what additional requirement applies?
A.Any hash algorithm can be used
B.Hashing is not an acceptable method
C.The hash must use a keyed cryptographic hash function (e.g., HMAC) to prevent rainbow table attacks
D.Only MD5 hashing is acceptable
Why C is correct
PCI DSS requires keyed cryptographic hashing to prevent attackers from using precomputed rainbow tables to reverse-engineer the PAN from its hash value.
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Where this fits in the PCI DSS exam
Cardholder Data
Covers cardholder data concepts and practices within PCI DSS.
This question belongs to the "Protect Cardholder Data" domain, which makes up about 20% of the PCI DSS exam.
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