# ri > Net::SSH::Transport::HMAC::SHA2_512

## [Net::SSH::Transport::HMAC::SHA2512](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ASSH%3A%3ATransport%3A%3AHMAC%3A%3ASHA2512/markdown) < [Net::SSH::Transport::HMAC::Abstract](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ASSH%3A%3ATransport%3A%3AHMAC%3A%3AAbstract/markdown)

(from /home/chedong/.local/share/rdoc)
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The SHA-512 HMAC algorithm. This has a mac and key length of 64, and
uses the SHA-512 digest algorithm.
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