Installing DataFlow on KNIME : Configuring DataFlow in KNIME : Protecting Passwords
 
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Protecting Passwords
Several nodes in DataFlow and KNIME require a password. For example, the nodes that work with databases generally require a password to connect to the database. The given password(s) are stored in the local configuration files to avoid entering them each time a workflow is used or run.
By default, passwords are not encrypted before storing in the local system. They are visible to everyone and could be used inappropriately.
To enable protecting the passwords using encryption, you must set a master key. After the master key is set, all the passwords are encrypted before storing. For more information, see Master Key.