tomaswolf commented on issue #686:
URL: https://github.com/apache/mina-sshd/issues/686#issuecomment-2710847985

   "Android-specific": the question was whether you had noticed similar 
degradation on other platforms. Apparently not.
   
   So: what security providers are there (besides Bouncy Castle) on Android 
devices? Is there any that would provide a native AES (and HmacSha256) 
implementation? If there is one, something like we did for SunJCE could perhaps 
be done for Android, and then you could configure your server to propose only 
AES ciphers. I would expect some performance gains from that.
   
   ("RSA encryption" will only be used for the so-called key exchange. In that 
key exchange, client and server determine a shared secret key for a much faster 
symmetric cipher that will then be used for actual data transfer. If we can 
make that symmetric cipher use a native implementation, uploads or downloads 
should be faster.)


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