# phpman > ri > Net::SSH::Transport::HMAC::MD5_96

## [Net::SSH::Transport::HMAC::MD596](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ASSH%3A%3ATransport%3A%3AHMAC%3A%3AMD596/markdown) < [Net::SSH::Transport::HMAC::MD5](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ASSH%3A%3ATransport%3A%3AHMAC%3A%3AMD5/markdown)

(from /home/chedong/.local/share/rdoc)
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The MD5-96 HMAC algorithm. This returns only the first 12 bytes of the
digest.
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