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From "Kim Haase (Assigned) (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (DERBY-5550) Document derby.authentication.builtin.saltLength and derby.authentication.builtin.iterations
Date Wed, 21 Dec 2011 14:07:30 GMT

     [ https://issues.apache.org/jira/browse/DERBY-5550?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Kim Haase reassigned DERBY-5550:

    Assignee: Kim Haase
> Document derby.authentication.builtin.saltLength and derby.authentication.builtin.iterations
> --------------------------------------------------------------------------------------------
>                 Key: DERBY-5550
>                 URL: https://issues.apache.org/jira/browse/DERBY-5550
>             Project: Derby
>          Issue Type: Improvement
>          Components: Documentation
>    Affects Versions:
>            Reporter: Knut Anders Hatlen
>            Assignee: Kim Haase
> DERBY-5539 introduced two new properties that control how BUILTIN stores credentials:
> - derby.authentication.builtin.saltLength (default: 16)
> This property specifies the number of bytes of random salt that will be added to the
credentials before hashing them. (Purpose of the property: Make it infeasible to construct
rainbow tables.)
> - derby.authentication.builtin.iterations (default: 1000, minimum: 1)
> This property specifies the number of times to apply the hash function (which is specified
by derby.authentication.builtin.algorithm) on the credentials. (Purpose of the property: Slow
down attackers as they'll need to spend more time calculating hashes.)
> Both the properties have effect only if BUILTIN authentication is enabled and derby.authentication.builtin.algorithm
has a non-null value.

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