The DCT could be expended to include user data as well. Wiced uses to store header, mfg_info, certificates, and config information and the rest of the DCT could be used by the user application. Size of the DCT depends on the platform. For example STM32F1xx is 8K and STM32F4xx is 16K.
Please check the ...\Wiced\Platform\include\platform_dct.h and expand it as needed.
Thank you, seyhan! I'll plan to use the app section if I need to use multiple certificates.