Averting turbulence in the air
CIO
DECEMBER 21, 2023
If hash algorithms were used instead to render cardholder data unreadable, they now need to be “keyed” hashes (hash-based MAC, cyber-based MAC, etc.) If one-way hashes such as SHA-256 were used, the airlines will have to replace the hashing algorithms to two-way hashes. The newly-updated PCI DSS v4.0 rather than one-way hashes.
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