diff --git a/plat/intel/soc/common/include/socfpga_fcs.h b/plat/intel/soc/common/include/socfpga_fcs.h
index 2eed341..15b7a2c 100644
--- a/plat/intel/soc/common/include/socfpga_fcs.h
+++ b/plat/intel/soc/common/include/socfpga_fcs.h
@@ -25,6 +25,9 @@
 #define FCS_ENCRYPTION_DATA_0			0x10100
 #define FCS_DECRYPTION_DATA_0			0x10102
 #define FCS_OWNER_ID_OFFSET			0xC
+#define FCS_CRYPTION_CRYPTO_HEADER		0x07000000
+#define FCS_CRYPTION_RESP_WORD_SIZE		4U
+#define FCS_CRYPTION_RESP_SIZE_OFFSET		3U
 
 #define PSGSIGMA_TEARDOWN_MAGIC			0xB852E2A4
 #define	PSGSIGMA_SESSION_ID_ONE			0x1
@@ -98,6 +101,27 @@
 	uint32_t dst_size;
 } fcs_decrypt_payload;
 
+typedef struct fcs_encrypt_ext_payload_t {
+	uint32_t session_id;
+	uint32_t context_id;
+	uint32_t crypto_header;
+	uint32_t src_addr;
+	uint32_t src_size;
+	uint32_t dst_addr;
+	uint32_t dst_size;
+} fcs_encrypt_ext_payload;
+
+typedef struct fcs_decrypt_ext_payload_t {
+	uint32_t session_id;
+	uint32_t context_id;
+	uint32_t crypto_header;
+	uint32_t owner_id[2];
+	uint32_t src_addr;
+	uint32_t src_size;
+	uint32_t dst_addr;
+	uint32_t dst_size;
+} fcs_decrypt_ext_payload;
+
 typedef struct psgsigma_teardown_msg_t {
 	uint32_t reserved_word;
 	uint32_t magic_word;
@@ -153,6 +177,15 @@
 				uint32_t dst_addr, uint32_t dst_size,
 				uint32_t *send_id);
 
+int intel_fcs_encryption_ext(uint32_t session_id, uint32_t context_id,
+				uint32_t src_addr, uint32_t src_size,
+				uint32_t dst_addr, uint32_t *dst_size,
+				uint32_t *mbox_error);
+int intel_fcs_decryption_ext(uint32_t sesion_id, uint32_t context_id,
+				uint32_t src_addr, uint32_t src_size,
+				uint32_t dst_addr, uint32_t *dst_size,
+				uint32_t *mbox_error);
+
 int intel_fcs_sigma_teardown(uint32_t session_id, uint32_t *mbox_error);
 int intel_fcs_chip_id(uint32_t *id_low, uint32_t *id_high, uint32_t *mbox_error);
 int intel_fcs_attestation_subkey(uint64_t src_addr, uint32_t src_size,
diff --git a/plat/intel/soc/common/include/socfpga_sip_svc.h b/plat/intel/soc/common/include/socfpga_sip_svc.h
index 3983533..3c92a4a 100644
--- a/plat/intel/soc/common/include/socfpga_sip_svc.h
+++ b/plat/intel/soc/common/include/socfpga_sip_svc.h
@@ -78,6 +78,7 @@
 #define INTEL_SIP_SMC_FCS_RANDOM_NUMBER			0xC200005A
 #define INTEL_SIP_SMC_FCS_RANDOM_NUMBER_EXT		0x4200008F
 #define INTEL_SIP_SMC_FCS_CRYPTION			0x4200005B
+#define INTEL_SIP_SMC_FCS_CRYPTION_EXT			0xC2000090
 #define INTEL_SIP_SMC_FCS_SEND_CERTIFICATE		0x4200005D
 #define INTEL_SIP_SMC_FCS_GET_PROVISION_DATA		0x4200005E
 #define INTEL_SIP_SMC_FCS_CNTR_SET_PREAUTH		0xC200005F
diff --git a/plat/intel/soc/common/sip/socfpga_sip_fcs.c b/plat/intel/soc/common/sip/socfpga_sip_fcs.c
index ff31c97..4f2c73d 100644
--- a/plat/intel/soc/common/sip/socfpga_sip_fcs.c
+++ b/plat/intel/soc/common/sip/socfpga_sip_fcs.c
@@ -337,6 +337,118 @@
 	return INTEL_SIP_SMC_STATUS_OK;
 }
 
+int intel_fcs_encryption_ext(uint32_t session_id, uint32_t context_id,
+		uint32_t src_addr, uint32_t src_size,
+		uint32_t dst_addr, uint32_t *dst_size, uint32_t *mbox_error)
+{
+	int status;
+	uint32_t payload_size;
+	uint32_t resp_len = FCS_CRYPTION_RESP_WORD_SIZE;
+	uint32_t resp_data[FCS_CRYPTION_RESP_WORD_SIZE] = {0U};
+
+	if ((dst_size == NULL) || (mbox_error == NULL)) {
+		return INTEL_SIP_SMC_STATUS_REJECTED;
+	}
+
+	if (!is_address_in_ddr_range(src_addr, src_size) ||
+		!is_address_in_ddr_range(dst_addr, *dst_size)) {
+		return INTEL_SIP_SMC_STATUS_REJECTED;
+	}
+
+	if (!is_size_4_bytes_aligned(src_size)) {
+		return INTEL_SIP_SMC_STATUS_REJECTED;
+	}
+
+	fcs_encrypt_ext_payload payload = {
+		session_id,
+		context_id,
+		FCS_CRYPTION_CRYPTO_HEADER,
+		src_addr,
+		src_size,
+		dst_addr,
+		*dst_size
+	};
+
+	payload_size = sizeof(payload) / MBOX_WORD_BYTE;
+
+	status = mailbox_send_cmd(MBOX_JOB_ID, MBOX_FCS_ENCRYPT_REQ,
+				(uint32_t *) &payload, payload_size,
+				CMD_CASUAL, resp_data, &resp_len);
+
+	if (status < 0) {
+		*mbox_error = -status;
+		return INTEL_SIP_SMC_STATUS_ERROR;
+	}
+
+	if (resp_len != FCS_CRYPTION_RESP_WORD_SIZE) {
+		*mbox_error = MBOX_RET_ERROR;
+		return INTEL_SIP_SMC_STATUS_ERROR;
+	}
+
+	*dst_size = resp_data[FCS_CRYPTION_RESP_SIZE_OFFSET];
+	inv_dcache_range(dst_addr, *dst_size);
+
+	return INTEL_SIP_SMC_STATUS_OK;
+}
+
+int intel_fcs_decryption_ext(uint32_t session_id, uint32_t context_id,
+		uint32_t src_addr, uint32_t src_size,
+		uint32_t dst_addr, uint32_t *dst_size, uint32_t *mbox_error)
+{
+	int status;
+	uintptr_t id_offset;
+	uint32_t payload_size;
+	uint32_t resp_len = FCS_CRYPTION_RESP_WORD_SIZE;
+	uint32_t resp_data[FCS_CRYPTION_RESP_WORD_SIZE] = {0U};
+
+	if ((dst_size == NULL) || (mbox_error == NULL)) {
+		return INTEL_SIP_SMC_STATUS_REJECTED;
+	}
+
+	if (!is_address_in_ddr_range(src_addr, src_size) ||
+		!is_address_in_ddr_range(dst_addr, *dst_size)) {
+		return INTEL_SIP_SMC_STATUS_REJECTED;
+	}
+
+	if (!is_size_4_bytes_aligned(src_size)) {
+		return INTEL_SIP_SMC_STATUS_REJECTED;
+	}
+
+	id_offset = src_addr + FCS_OWNER_ID_OFFSET;
+	fcs_decrypt_ext_payload payload = {
+		session_id,
+		context_id,
+		FCS_CRYPTION_CRYPTO_HEADER,
+		{mmio_read_32(id_offset),
+		mmio_read_32(id_offset + MBOX_WORD_BYTE)},
+		src_addr,
+		src_size,
+		dst_addr,
+		*dst_size
+	};
+
+	payload_size = sizeof(payload) / MBOX_WORD_BYTE;
+
+	status = mailbox_send_cmd(MBOX_JOB_ID, MBOX_FCS_DECRYPT_REQ,
+				(uint32_t *) &payload, payload_size,
+				CMD_CASUAL, resp_data, &resp_len);
+
+	if (status < 0) {
+		*mbox_error = -status;
+		return INTEL_SIP_SMC_STATUS_ERROR;
+	}
+
+	if (resp_len != FCS_CRYPTION_RESP_WORD_SIZE) {
+		*mbox_error = MBOX_RET_ERROR;
+		return INTEL_SIP_SMC_STATUS_ERROR;
+	}
+
+	*dst_size = resp_data[FCS_CRYPTION_RESP_SIZE_OFFSET];
+	inv_dcache_range(dst_addr, *dst_size);
+
+	return INTEL_SIP_SMC_STATUS_OK;
+}
+
 int intel_fcs_sigma_teardown(uint32_t session_id, uint32_t *mbox_error)
 {
 	int status;
diff --git a/plat/intel/soc/common/socfpga_sip_svc.c b/plat/intel/soc/common/socfpga_sip_svc.c
index fff1285..824ee38 100644
--- a/plat/intel/soc/common/socfpga_sip_svc.c
+++ b/plat/intel/soc/common/socfpga_sip_svc.c
@@ -786,6 +786,23 @@
 
 		SMC_RET3(handle, status, x4, x5);
 
+	case INTEL_SIP_SMC_FCS_CRYPTION_EXT:
+		x5 = SMC_GET_GP(handle, CTX_GPREG_X5);
+		x6 = SMC_GET_GP(handle, CTX_GPREG_X6);
+		x7 = SMC_GET_GP(handle, CTX_GPREG_X7);
+
+		if (x3 == FCS_MODE_DECRYPT) {
+			status = intel_fcs_decryption_ext(x1, x2, x4, x5, x6,
+					(uint32_t *) &x7, &mbox_error);
+		} else if (x3 == FCS_MODE_ENCRYPT) {
+			status = intel_fcs_encryption_ext(x1, x2, x4, x5, x6,
+					(uint32_t *) &x7, &mbox_error);
+		} else {
+			status = INTEL_SIP_SMC_STATUS_REJECTED;
+		}
+
+		SMC_RET4(handle, status, mbox_error, x6, x7);
+
 	case INTEL_SIP_SMC_FCS_RANDOM_NUMBER:
 		status = intel_fcs_random_number_gen(x1, &retval64,
 							&mbox_error);