As with any project, security planning should be a major part of a modernization project. Security should be considered for all changes that are made when you modernize, but modernization is a great time to examine the overall security of your application and your system. There are multiple areas, or levels, to consider regarding security.
This chapter covers some basic concepts. There are entire books on the topic of IBM i security and companies that specialize in securing systems. A great place to start is Security Guide for IBM i V6.1 ...

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