PFLI

AcronymDefinition
PFLIPhotographic Federation of Long Island
PFLIPharmacists for Life International Canada
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Step 4: Judgment Module judges whether the LF is fresh and whether the PFs are legal by checking whether the one-way hash output of the concatenation of current PFs' locations is equal to the hash value stored in PFLI.
Step 8: Update Module replaces the hash value stored in PFLI with the one-way hash output of the concatenation of current PFs' locations.
Step 9: Update Module computes the MAC value of the current data saved in both RULL and PFLI, and then replaces the old MAC value stored in the LF with the new one.
When the regress occurs in the PF, an attacker can replace the current LF with an old backup copy with the same content in PFLI to carry out the replay attack.
Compared to the regress, there is a small probability event that the current content in PFLI is same to a previous one.
When a repetition occurs, an attacker can replace the current LF with an old backup copy, which contains the PFLI as same as the current one, to carry out the replay attack.
When regresses result in the current content in PFLI becoming as same as a previous one, a repetition occurs.