According to:
https://wiki.tizen.org/SDK
````
Q: on tizen-studio CLI ?
error : 23
end process (fail)
processing result : SIGNATURE_VERIFICATION_FAILED [23] failed
spend time for pkgcmd is [3822]ms
cmd_ret:23
or IDE
Error code: SIGNATURE_VERIFICATION_FAILED
Error message: SIGNATURE_VERIFICATION_FAILED
Command: /usr/bin/pkgcmd -q -i -t tpk -p "/opt/usr/apps/tmp/org.example.*-arm.tpk"
Management: Check whether the package is modified illegally. If there is an installed package which has same name and different signature with your package, you can receive this error return also.
A:
Select / an other certificate from IDE
Check privileges with "sdb dlog" or certificates issues
sdb dlog | grep signature
E/PKGMGR_PARSER( 9735): pkgmgr_parser_signature.c: __ps_check_mdm_policy_by_pkgid(1056) > (ret != MDM_RESULT_SUCCESS) can not connect mdm server
W/CERT_SVC( 9834): SignatureValidator.cpp: check(432) > signature1.xml has got unrecognized Root CA certificate. Signature will be disregarded.
E/rpm-installer( 9834): coretpk-signature-validator.cpp: _coretpk_signature_validator_validate_signatures(148) > (valRes != ValidationCore::SignatureValidator::SIGNATURE_VERIFIED) validator.check() is failed, valRes=[-34]
E/rpm-installer( 9834): installer-util.c: _installer_util_get_configuration_value(600) > [signature]=[on]
E/rpm-installer( 9834): coretpk-installer.c: _coretpk_installer_install_package(3654) > _coretpk_signature_validator_validate_signatures(/opt/usr/data/pkgmgr/org.example./, org.example.) failed. ret=[-34]
````