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https://issues.apache.org/jira/browse/CASSANDRA-11518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15268956#comment-15268956
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Branimir Lambov commented on CASSANDRA-11518:
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LGTM
> o.a.c.utils.UUIDGen clock generation is not very high in entropy
> ----------------------------------------------------------------
>
> Key: CASSANDRA-11518
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11518
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Ariel Weisberg
> Assignee: Ariel Weisberg
> Priority: Trivial
> Fix For: 3.0.x, 3.x
>
>
> makeClockSeqAndNode uses {{java.util.Random}} to generate the clock.
> {{Random}} only has 48-bits of internal state so it's not going to generate
> the best bits for clock and in addition to that it uses a collision prone
> seed that sort of defeats the purpose of clock sequence.
> A better approach to get the most out of those 14-bits would be to use
> {{SecureRandom}} with something like SHA1PRNG.
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