A " Signature algorithm not supported" error message implies that the certificate type used in the printer is not supported.
Because of the recently found vulnerabilities on SHA1 certificates, users are now moving to SHA2 certificates.
has four kinds of hash functions:
Although Lexmark printers support the SHA2 certificate, not all of them support all hash functions, especially SHA384 and SHA512.
Printer models that support SHA384 and SHA512:
Here are the list of printers that support SHA384 and SHA512:
Product announced year
MS31x, MS41x, MS51x, MS61x, MS71x, MS81x, MS91x, MX31x, MX41x, MX51x, MX61x, MX71x, MX81x, MX91x, CS31x, CS41x, CS51x, CX31x, CX41x, CX51x
CS720, CS725, CS820, C6160, CX725, CX820, CX825, CX860, XC6152, XC8155, XC8160
For users who have older printer models and want to use the SHA384 and SHA512 hash functions, a Special Product Request (SPR) process is necessary to proceed. Please contact Lexmark Technical Support for assessment and more information.
Still Need Help?
Have the following available when calling Lexmark Technical Support;
Printer serial number
Software / Solution
LEGACY ID: FA1226
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