Message SAP WSS019 - X.509 signature validation failed (CRC &2, WP &3 )

Diagnosis
The X.509 signature was rejected by the system.

System Response

Procedure
The signature is checked against the STRUST WS Security identity &V1&,but failed due to:
CRC &V2&:
0 ok
1 failed to find external security library
2 format error
3 wrong input data
4 unsufficient memory for processing
5 signature certificate is not trusted. To trust the signature,add the certificate (+ chain when issued by an certificate authority) tothe STRUST WS Security Identity &V1&
6 unsufficient memory for results
7 unknown address book
8 wrong password for address book
10 unsupported hash algorithm
11 ASN.1 coding failed
12 ASN.1 decoding failed
13 unknown error in crypto library. Check kernel traces fordetails.
Additional information may be in the kernel traces of work process &V3&.