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permissions on redo log files

I have received complain from people responsible for security of SAP data that redo log files have permission 755 (everyone can read from them)

I would like to get your input on the following :

- Is this a material risk?? In other words, how u201Ceasyu201D would it be to reconstruct something meaningful out of the redo-logs provided that you know exactly in which tables certain business data is stored ?

- This is apparently a SAP standard (can it be confirmed ?) Are there plans with SAP, as of certain release, to change this to a more secure file permission ?

- Is there any risk in changing these permissions to something more restrictive and what are the challenges ?

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