Core Dump Encryption methods
I do not think, there is a way to enable the encryption for coredump by default. If there is a way it will be very much useful to the servers which will have the senstivity information like Credit Card info and bank sector information.
Responses
Can you please clarify whether you are talking about kernel core dumps ("vmcore"s) or application core dumps? Also, are you primarily concerned about encryption as a means of protecting the coredump's contents at rest (stored on filesystem/storage) or in transit (e.g. when uploading it to Red Hat for analysis purposes).
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