failed to decrypt log block

hi everybody..

would you know how to recover from such a problem:

InnoDB: ok header, but checksum field contains 792537472, 
should be 1776874443
2016-04-04 12:41:15 140333716928640 [ERROR] InnoDB: Redo log 
crypto: failed to decrypt log block. Reason could be that 
requested key version is not found, required encryption key 
management plugin is not found or configured encryption 
algorithm and/or method does not match.
2016-04-04 12:41:15 140333716928640 [ERROR] Plugin 'InnoDB' 
init function returned error.
2016-04-04 12:41:15 140333716928640 [ERROR] Plugin 'InnoDB' 
registration as a STORAGE ENGINE failed.

gee, I really have not clue what happened there.
for sharing thought & suggestions,
many thanks,
L.

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