Ariel Weisberg created CASSANDRA-11518:
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Summary: 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.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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