diff --git a/plat/intel/soc/common/drivers/sdmmc/sdmmc.c b/plat/intel/soc/common/drivers/sdmmc/sdmmc.c
index 8666f54c2..48f91eb06 100644
--- a/plat/intel/soc/common/drivers/sdmmc/sdmmc.c
+++ b/plat/intel/soc/common/drivers/sdmmc/sdmmc.c
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2022-2023, Intel Corporation. All rights reserved.
+ * Copyright (c) 2024, Altera Corporation. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -19,6 +20,7 @@
 
 #include "agilex5_pinmux.h"
 #include "sdmmc.h"
+#include "socfpga_mailbox.h"
 
 static const struct mmc_ops *ops;
 static unsigned int mmc_ocr_value;
@@ -518,7 +520,8 @@ static int sdmmc_enumerate(unsigned int clk, unsigned int bus_width)
 		return ret;
 	}
 
-	memcpy(&mmc_csd, &resp_data, sizeof(resp_data));
+	memcpy_s(&mmc_csd, sizeof(mmc_csd) / MBOX_WORD_BYTE,
+		&resp_data, sizeof(resp_data) / MBOX_WORD_BYTE);
 
 	/* CMD7: Select Card */
 	ret = sdmmc_send_cmd(MMC_CMD(7), rca << RCA_SHIFT_OFFSET,
@@ -758,7 +761,8 @@ int sdmmc_init(handoff *hoff_ptr, struct cdns_sdmmc_params *params, struct mmc_d
 		(params->bus_width == MMC_BUS_WIDTH_4) ||
 		(params->bus_width == MMC_BUS_WIDTH_8)));
 
-	memcpy(&cdns_params, params, sizeof(struct cdns_sdmmc_params));
+	memcpy_s(&cdns_params, sizeof(struct cdns_sdmmc_params) / MBOX_WORD_BYTE,
+		params, sizeof(struct cdns_sdmmc_params) / MBOX_WORD_BYTE);
 	cdns_params.cdn_sdmmc_dev_type = info->mmc_dev_type;
 	cdns_params.cdn_sdmmc_dev_mode = SD_DS;
 
diff --git a/plat/intel/soc/common/sip/socfpga_sip_fcs.c b/plat/intel/soc/common/sip/socfpga_sip_fcs.c
index adeb069d7..91df934f2 100644
--- a/plat/intel/soc/common/sip/socfpga_sip_fcs.c
+++ b/plat/intel/soc/common/sip/socfpga_sip_fcs.c
@@ -1,5 +1,6 @@
 /*
- * Copyright (c) 2020-2022, Intel Corporation. All rights reserved.
+ * Copyright (c) 2020-2023, Intel Corporation. All rights reserved.
+ * Copyright (c) 2024, Altera Corporation. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -1164,8 +1165,8 @@ int intel_fcs_mac_verify_update_finalize(uint32_t session_id,
 			return INTEL_SIP_SMC_STATUS_REJECTED;
 		}
 
-		memcpy((uint8_t *) &payload[i], (uint8_t *) mac_offset,
-		src_size - data_size);
+		memcpy_s(&payload[i], (src_size - data_size) / MBOX_WORD_BYTE,
+			(void *) mac_offset, (src_size - data_size) / MBOX_WORD_BYTE);
 
 		i += (src_size - data_size) / MBOX_WORD_BYTE;
 	}
@@ -1298,8 +1299,8 @@ int intel_fcs_mac_verify_smmu_update_finalize(uint32_t session_id,
 			return INTEL_SIP_SMC_STATUS_REJECTED;
 		}
 
-		memcpy((uint8_t *) &payload[i], (uint8_t *) mac_offset,
-		src_size - data_size);
+		memcpy_s(&payload[i], (src_size - data_size) / MBOX_WORD_BYTE,
+			(void *) mac_offset, (src_size - data_size) / MBOX_WORD_BYTE);
 
 		memset((void *) dst_addr, 0, *dst_size);
 
@@ -1401,8 +1402,8 @@ int intel_fcs_ecdsa_hash_sign_finalize(uint32_t session_id, uint32_t context_id,
 		return INTEL_SIP_SMC_STATUS_REJECTED;
 	}
 
-	memcpy((uint8_t *) &payload[i], (uint8_t *) hash_data_addr,
-			src_size);
+	memcpy_s(&payload[i], src_size / MBOX_WORD_BYTE,
+		(void *) hash_data_addr, src_size / MBOX_WORD_BYTE);
 
 	i += src_size / MBOX_WORD_BYTE;
 
@@ -1502,8 +1503,8 @@ int intel_fcs_ecdsa_hash_sig_verify_finalize(uint32_t session_id, uint32_t conte
 		return INTEL_SIP_SMC_STATUS_REJECTED;
 	}
 
-	memcpy((uint8_t *) &payload[i],
-			(uint8_t *) hash_sig_pubkey_addr, src_size);
+	memcpy_s(&payload[i], src_size / MBOX_WORD_BYTE,
+		(void *) hash_sig_pubkey_addr, src_size / MBOX_WORD_BYTE);
 
 	i += (src_size / MBOX_WORD_BYTE);
 
@@ -1839,8 +1840,8 @@ int intel_fcs_ecdsa_sha2_data_sig_verify_update_finalize(uint32_t session_id,
 			return INTEL_SIP_SMC_STATUS_REJECTED;
 		}
 
-		memcpy((uint8_t *) &payload[i], (uint8_t *) sig_pubkey_offset,
-			src_size - data_size);
+		memcpy_s(&payload[i], (src_size - data_size) / MBOX_WORD_BYTE,
+			(void *) sig_pubkey_offset, (src_size - data_size) / MBOX_WORD_BYTE);
 
 		i += (src_size - data_size) / MBOX_WORD_BYTE;
 	}
@@ -1971,8 +1972,8 @@ int intel_fcs_ecdsa_sha2_data_sig_verify_smmu_update_finalize(uint32_t session_i
 			return INTEL_SIP_SMC_STATUS_REJECTED;
 		}
 
-		memcpy((uint8_t *) &payload[i], (uint8_t *) sig_pubkey_offset,
-			src_size - data_size);
+		memcpy_s(&payload[i], (src_size - data_size) / MBOX_WORD_BYTE,
+			(void *) sig_pubkey_offset, (src_size - data_size) / MBOX_WORD_BYTE);
 
 		memset((void *) dst_addr, 0, *dst_size);
 
@@ -2145,7 +2146,8 @@ int intel_fcs_ecdh_request_finalize(uint32_t session_id, uint32_t context_id,
 		return INTEL_SIP_SMC_STATUS_REJECTED;
 	}
 
-	memcpy((uint8_t *) &payload[i], (uint8_t *) pubkey, src_size);
+	memcpy_s(&payload[i], src_size / MBOX_WORD_BYTE,
+		(void *) pubkey, src_size / MBOX_WORD_BYTE);
 	i += src_size / MBOX_WORD_BYTE;
 
 	status = mailbox_send_cmd(MBOX_JOB_ID, MBOX_FCS_ECDH_REQUEST,
@@ -2223,8 +2225,8 @@ int intel_fcs_aes_crypt_init(uint32_t session_id, uint32_t context_id,
 	fcs_aes_init_payload.param_size = param_size;
 	fcs_aes_init_payload.key_id	= key_id;
 
-	memcpy((uint8_t *) fcs_aes_init_payload.crypto_param,
-		(uint8_t *) param_addr, param_size);
+	memcpy_s(fcs_aes_init_payload.crypto_param, param_size / MBOX_WORD_BYTE,
+		(void *) param_addr, param_size / MBOX_WORD_BYTE);
 
 	fcs_aes_init_payload.is_updated = 0;
 
@@ -2304,9 +2306,10 @@ int intel_fcs_aes_crypt_update_finalize(uint32_t session_id,
 			return INTEL_SIP_SMC_STATUS_REJECTED;
 		}
 
-		memcpy((uint8_t *) &fcs_aes_crypt_payload[i],
-			(uint8_t *) fcs_aes_init_payload.crypto_param,
-			fcs_aes_init_payload.param_size);
+		memcpy_s(&fcs_aes_crypt_payload[i],
+			fcs_aes_init_payload.param_size / MBOX_WORD_BYTE,
+			(void *) fcs_aes_init_payload.crypto_param,
+			fcs_aes_init_payload.param_size / MBOX_WORD_BYTE);
 
 		i += fcs_aes_init_payload.param_size / MBOX_WORD_BYTE;
 	}
diff --git a/plat/intel/soc/common/soc/socfpga_handoff.c b/plat/intel/soc/common/soc/socfpga_handoff.c
index 526c6e114..697476884 100644
--- a/plat/intel/soc/common/soc/socfpga_handoff.c
+++ b/plat/intel/soc/common/soc/socfpga_handoff.c
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2019-2023, Intel Corporation. All rights reserved.
+ * Copyright (c) 2024, Altera Corporation. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -15,15 +16,21 @@
 int socfpga_get_handoff(handoff *reverse_hoff_ptr)
 {
 	int i;
+	int j;
 	uint32_t *buffer;
-	handoff *handoff_ptr = (handoff *) PLAT_HANDOFF_OFFSET;
+	uint32_t *handoff_ptr = (uint32_t *) PLAT_HANDOFF_OFFSET;
+	uint32_t *reverse_hoff_ptr_dst = (uint32_t *) reverse_hoff_ptr;
 
 	if (sizeof(*handoff_ptr) > sizeof(handoff)) {
 		return -EOVERFLOW;
 	}
 
-	memcpy(reverse_hoff_ptr, handoff_ptr, sizeof(handoff));
-	buffer = (uint32_t *)reverse_hoff_ptr;
+	for (j = 0; j < sizeof(handoff) / 4; j++) {
+		memcpy_s((void *) (reverse_hoff_ptr_dst + j), 1,
+			(void *) (handoff_ptr + j), 1);
+	}
+
+	buffer = (uint32_t *)reverse_hoff_ptr_dst;
 
 	/* convert big endian to little endian */
 	for (i = 0; i < sizeof(handoff) / 4; i++)
diff --git a/plat/intel/soc/common/soc/socfpga_mailbox.c b/plat/intel/soc/common/soc/socfpga_mailbox.c
index b8e5cded5..74ecc9533 100644
--- a/plat/intel/soc/common/soc/socfpga_mailbox.c
+++ b/plat/intel/soc/common/soc/socfpga_mailbox.c
@@ -252,7 +252,7 @@ int mailbox_read_response_async(unsigned int *job_id, uint32_t *header,
 				return MBOX_RET_ERROR;
 			}
 
-			memcpy((uint8_t *) response,
+			memcpy_s((uint8_t *) response, *resp_len * MBOX_WORD_BYTE,
 				(uint8_t *) mailbox_resp_ctr.payload->data,
 				*resp_len * MBOX_WORD_BYTE);
 		}
diff --git a/plat/intel/soc/common/socfpga_psci.c b/plat/intel/soc/common/socfpga_psci.c
index c93e13f52..623843e3b 100644
--- a/plat/intel/soc/common/socfpga_psci.c
+++ b/plat/intel/soc/common/socfpga_psci.c
@@ -1,6 +1,7 @@
 /*
  * Copyright (c) 2019-2023, ARM Limited and Contributors. All rights reserved.
  * Copyright (c) 2019-2023, Intel Corporation. All rights reserved.
+ * Copyright (c) 2024, Altera Corporation. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -183,8 +184,9 @@ static void __dead2 socfpga_system_reset(void)
 {
 	uint32_t addr_buf[2];
 
-	memcpy(addr_buf, &intel_rsu_update_address,
-			sizeof(intel_rsu_update_address));
+	memcpy_s(addr_buf, sizeof(intel_rsu_update_address),
+		&intel_rsu_update_address, sizeof(intel_rsu_update_address));
+
 	if (intel_rsu_update_address) {
 		mailbox_rsu_update(addr_buf);
 	} else {
diff --git a/plat/intel/soc/common/socfpga_vab.c b/plat/intel/soc/common/socfpga_vab.c
index d1734c83c..969abb34e 100644
--- a/plat/intel/soc/common/socfpga_vab.c
+++ b/plat/intel/soc/common/socfpga_vab.c
@@ -113,7 +113,8 @@ int socfpga_vab_authentication(void **p_image, size_t *p_size)
 
 	VERBOSE("mbox_data_addr = %lx    mbox_data_sz = %d\n", mbox_data_addr, mbox_data_sz);
 
-	memcpy(mbox_relocate_data_addr, (uint8_t *)mbox_data_addr, mbox_data_sz * sizeof(uint32_t));
+	memcpy_s(mbox_relocate_data_addr, mbox_data_sz * sizeof(uint32_t),
+		(uint8_t *)mbox_data_addr, mbox_data_sz * sizeof(uint32_t));
 
 	*((unsigned int *)mbox_relocate_data_addr) = CCERT_CMD_TEST_PGM_MASK;