diff --git a/plat/intel/soc/common/include/socfpga_mailbox.h b/plat/intel/soc/common/include/socfpga_mailbox.h
index 3ab6f52..3abf39d 100644
--- a/plat/intel/soc/common/include/socfpga_mailbox.h
+++ b/plat/intel/soc/common/include/socfpga_mailbox.h
@@ -129,6 +129,10 @@
 #define MBOX_BUSY					-5
 #define MBOX_TIMEOUT					-2047
 
+/* Key Status */
+#define MBOX_RET_SDOS_DECRYPTION_ERROR_102		-258
+#define MBOX_RET_SDOS_DECRYPTION_ERROR_103		-259
+
 /* Reconfig Status Response */
 #define RECONFIG_STATUS_STATE				0
 #define RECONFIG_STATUS_PIN_STATUS			2
diff --git a/plat/intel/soc/common/sip/socfpga_sip_fcs.c b/plat/intel/soc/common/sip/socfpga_sip_fcs.c
index f18c3e4..3b0b370 100644
--- a/plat/intel/soc/common/sip/socfpga_sip_fcs.c
+++ b/plat/intel/soc/common/sip/socfpga_sip_fcs.c
@@ -411,7 +411,10 @@
 				(uint32_t *) &payload, payload_size,
 				CMD_CASUAL, resp_data, &resp_len);
 
-	if (status < 0) {
+	if (status == MBOX_RET_SDOS_DECRYPTION_ERROR_102 ||
+		status == MBOX_RET_SDOS_DECRYPTION_ERROR_103) {
+		*mbox_error = -status;
+	} else if (status < 0) {
 		*mbox_error = -status;
 		return INTEL_SIP_SMC_STATUS_ERROR;
 	}
diff --git a/plat/intel/soc/common/socfpga_sip_svc.c b/plat/intel/soc/common/socfpga_sip_svc.c
index a20e61c..79f743f 100644
--- a/plat/intel/soc/common/socfpga_sip_svc.c
+++ b/plat/intel/soc/common/socfpga_sip_svc.c
@@ -611,7 +611,10 @@
 	*ret_size = resp_len * MBOX_WORD_BYTE;
 	flush_dcache_range(addr, *ret_size);
 
-	if (status != MBOX_RET_OK) {
+	if (status == MBOX_RET_SDOS_DECRYPTION_ERROR_102 ||
+		status == MBOX_RET_SDOS_DECRYPTION_ERROR_103) {
+		*mbox_error = -status;
+	} else if (status != MBOX_RET_OK) {
 		*mbox_error = -status;
 		return INTEL_SIP_SMC_STATUS_ERROR;
 	}