thank you for your reply！I have updated to the latest version of Twisted 16.6.0, but the problem remains. More detailed debugging information with -vvv in http://stackoverflow.com/questions/41254398/twisted-hmac-sha2-512-corrupted-... . I really do not know how to do it now. Best regards, ---jianchen At 2016-12-22 08:45:40, "Glyph Lefkowitz" <glyph@twistedmatrix.com> wrote: Hi Jianchen, As I said on stack overflow, you will need to upgrade to a more recent version of Twisted to get a version with that bug fixed. If it's still a problem in a current version, you'll need to provide more details, ideally a short SSCCE http://sscce.org explaining how to get a broken SSH server with conch. Thanks for using Twisted & Conch - I hope a simple upgrade will fix it for you! -glyph On Dec 20, 2016, at 7:15 PM, 陈健 <chenjianhappy2008@126.com> wrote: hi: | | I write a SSH server with Twisted(15.5.0) Conch. But it don't support hmac-sha2-512 MAC algorithms | . However I see this problem has been fixed in https://twistedmatrix.com/trac/ticket/8108 . I asked the question in http://stackoverflow.com/questions/41254398/twisted-hmac-sha2-512-corrupted-... . Best regards, ---jianchen _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python