The system default QOP is defined by the TdgssLibraryConfigFile.xml.
You can configure a stronger encryption algorithm for the DEFAULT QOP. See QOP Configuration Options.
<!-- Low, Medium and High QOP values are all set to "Default" unless the Low, Medium and High values are explicitly set in TdgssUserConfigFile.xml --> <!-- To update security uncomment one or more QOPs and edit. --> <!-- DEFAULT QOP <MechQop Value="Default"> AES-K128_GCM_PKCS5Padding_SHA2_DH-K2048 AES-K128_CBC_PKCS5Padding_SHA1_DH-K2048 AES-K192_GCM_PKCS5Padding_SHA2_DH-K2048 AES-K192_CBC_PKCS5Padding_SHA1_DH-K2048 AES-K256_GCM_PKCS5Padding_SHA2_DH-K2048 AES-K256_CBC_PKCS5Padding_SHA1_DH-K2048 </MechQop> -->