This blog post describes how to keep sensitive data secure on slave servers in a MySQL async replication setup. Almost every web application has a sensitive data: passwords, SNN, credit cards, emails, etc. Splitting the database to secure and public parts allows for restricting user and application parts access to sensitive data. Field encryption This is [&]

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https://www.percona.com/blog/2018/04/30/keep-sensitive-data-secure-in-replication-setup/