Nettitude Blog

What is File Integrity Monitoring (FIM)?

File Integrity Monitoring (FIM) is a control or process that compares the current state of operating system and/or application software files against a known baseline to validate the integrity of the files (i.e. looking for inconsistencies).

The integrity verification uses a cryptographic hash function to calculate an initial checksum of a file, which is then compared with a newer calculated checksum of the current state of the same file. In essence, a checksum is a small block of data that is derived from another block of data.

Statistics show that in 2021, online retail sales amounted to a staggering 4.9 trillion dollars, with purchases made by over two billion customers.

Experts anticipate that this trend will continue as more people select the ease of internet shopping. Unfortunately, it has also encouraged cyber criminals to target this area.

These two factors have prompted retailers and security experts to focus on improving online retail cybersecurity measures. 

The wait is finally over and PCI DSS v4.0 is released today, 31st March 2022. Whatever the size of your organisation, volume of payments or size of in-scope network, there will be an impact to you of some kind, but for today it's business as usual.

In this post, we discuss six areas in PCI DSS v4.0, which we think you should be aware of today, with much more detail to come.

For now, we will take it easy and focus on the key themes and changes: