ORA-12649: Unknown encryption or data integrity algorithm

Hi DBAs,

One of our dbs export falied.
It was always successful before.
The error message is:

EXP-00056: ORACLE error 12649 encountered
ORA-12649: Unknown encryption or data integrity algorithm
Any idea about this eror?

Thanks,

Quote:

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TNS-12649 Unknown encryption or data integrity algorithm

Cause: A SQL*Net list-of-algorithms parameter included an algorithm name that was not recognized.

Action: Either remove that algorithm name, correct it if it was misspelled, or install the driver for the missing algorithm.

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Have a look at the sqlnet.ora