diff --git a/arch/arm/mach-keystone/mon.c b/arch/arm/mach-keystone/mon.c
index 256f630..8100984 100644
--- a/arch/arm/mach-keystone/mon.c
+++ b/arch/arm/mach-keystone/mon.c
@@ -10,6 +10,7 @@
 #include <common.h>
 #include <command.h>
 #include <mach/mon.h>
+#include <spl.h>
 asm(".arch_extension sec\n\t");
 
 int mon_install(u32 addr, u32 dpsc, u32 freq)
@@ -61,3 +62,75 @@
 		: "cc", "r0", "r1", "memory");
 	return  result;
 }
+
+#ifdef CONFIG_TI_SECURE_DEVICE
+#define KS2_HS_SEC_HEADER_LEN	0x60
+#define KS2_HS_SEC_TAG_OFFSET	0x34
+#define KS2_AUTH_CMD		130
+
+/**
+ * k2_hs_bm_auth() - Invokes security functions using a
+ * proprietary TI interface. This binary and source for
+ * this is available in the secure development package or
+ * SECDEV. For details on how to access this please refer
+ * doc/README.ti-secure
+ *
+ * @cmd: Secure monitor command
+ * @arg1: Argument for command
+ *
+ * returns non-zero value on success, zero on error
+ */
+static int k2_hs_bm_auth(int cmd, void *arg1)
+{
+	int result;
+
+	asm volatile (
+		"stmfd  r13!, {r4-r12, lr}\n"
+		"mov r0, %1\n"
+		"mov r1, %2\n"
+		"smc #2\n"
+		"ldmfd r13!, {r4-r12, lr}\n"
+		: "=&r" (result)
+		: "r" (cmd), "r" (arg1)
+		: "cc", "r0", "r1", "memory");
+
+	return  result;
+}
+
+void board_fit_image_post_process(void **p_image, size_t *p_size)
+{
+	int result = 0;
+	void *image = *p_image;
+
+	if (strncmp(image + KS2_HS_SEC_TAG_OFFSET, "KEYS", 4)) {
+		printf("No signature found in image!\n");
+		hang();
+	}
+
+	result = k2_hs_bm_auth(KS2_AUTH_CMD, image);
+	if (result == 0) {
+		printf("Authentication failed!\n");
+		hang();
+	}
+
+	/*
+	* Overwrite the image headers after authentication
+	* and decryption. Update size to reflect removal
+	* of header.
+	*/
+	memcpy(image, image + KS2_HS_SEC_HEADER_LEN, *p_size);
+	*p_size -= KS2_HS_SEC_HEADER_LEN;
+
+	/*
+	 * Output notification of successful authentication to re-assure the
+	 * user that the secure code is being processed as expected. However
+	 * suppress any such log output in case of building for SPL and booting
+	 * via YMODEM. This is done to avoid disturbing the YMODEM serial
+	 * protocol transactions.
+	 */
+	if (!(IS_ENABLED(CONFIG_SPL_BUILD) &&
+	      IS_ENABLED(CONFIG_SPL_YMODEM_SUPPORT) &&
+	      spl_boot_device() == BOOT_DEVICE_UART))
+		printf("Authentication passed\n");
+}
+#endif