It would be nice to have a statement from Check Point on how the clear text data is protected while doing HTTPS Inspection, I guess that at some point is ""accessible"" in memory at least for some daemons.
Having said that and knowing Check Point philosophy I'm pretty sure that it's not accessible by users.
In the end it all depends on your C level of psychosis (AKA risk tolerance). If we speak about risk, not having HTTPS Inspection is far more riskier than worrying about credential sniffing in a hardened OS that performs that function.
Remember that you can bypass various categories.
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