diff --git a/include/osi_macsec.h b/include/osi_macsec.h
index 6316f45..cdbc6c1 100644
--- a/include/osi_macsec.h
+++ b/include/osi_macsec.h
@@ -396,6 +396,9 @@ struct osi_macsec_core_ops {
 	/** macsec debug buffer config */
 	nve32_t (*dbg_events_config)(struct osi_core_priv_data *const osi_core,
 		 struct osi_macsec_dbg_buf_config *const dbg_buf_config);
+	/** macsec get Key Index start for a given SCI */
+	nve32_t (*get_sc_lut_key_index)(struct osi_core_priv_data *const osi_core,
+		 nveu8_t *sci, nve32_t *key_index, nveu16_t ctlr);
 
 };
 
@@ -900,4 +903,43 @@ nve32_t osi_macsec_dbg_events_config(
 		struct osi_core_priv_data *const osi_core,
 		struct osi_macsec_dbg_buf_config *const dbg_buf_config);
 
+/**
+ * @brief MACSEC Key Index Start for a given SCI
+ *
+ * @note
+ * Algorithm:
+ * - Retrieves the Key_index used for a given SCI in SC.
+ *
+ * @param[in] osi_core: OSI core private data structure.
+ * @param[in] sci: Secure Channel Identifier
+ * @param[out] key_index: Pointer which will be filled with key_index start
+ * @param[in] ctrl: Tx or Rx controller
+ *
+ *
+ * @pre
+ * - MACSEC shall be initialized and enalbed
+ *
+ * @note
+ * Traceability Details:
+ * - SWUD_ID:
+ *
+ * @note
+ * Classification:
+ * - Interrupt: No
+ * - Signal handler: No
+ * - Thread safe: No
+ * - Required Privileges: None
+ *
+ * @note
+ * API Group:
+ * - Initialization: No
+ * - Run time: Yes
+ * - De-initialization: No
+ *
+ * @retval vaid Key Index Start on success
+ * @retval -1 on failure
+ */
+nve32_t osi_macsec_get_sc_lut_key_index(
+		struct osi_core_priv_data *const osi_core,
+		nveu8_t *sci, nve32_t *key_index, nveu16_t ctlr);
 #endif /* INCLUDED_OSI_MACSEC_H */
diff --git a/osi/core/macsec.c b/osi/core/macsec.c
index 0ac216d..870e82a 100644
--- a/osi/core/macsec.c
+++ b/osi/core/macsec.c
@@ -2672,6 +2672,32 @@ static struct osi_macsec_sc_info *find_existing_sc(
 	return OSI_NULL;
 }
 
+nve32_t macsec_get_sc_lut_key_index(struct osi_core_priv_data *const osi_core,
+				nveu8_t *sci, nve32_t *key_index, nveu16_t ctlr)
+{
+	struct osi_macsec_sc_info sc;
+	struct osi_macsec_sc_info *sc_info = OSI_NULL;
+
+	/* Validate inputs */
+	if ((sci == OSI_NULL) || (key_index == OSI_NULL) ||
+	    (ctlr > OSI_CTLR_SEL_MAX)) {
+		OSI_CORE_ERR(osi_core->osd, OSI_LOG_ARG_HW_FAIL,
+			     "Params validation failed\n", 0ULL);
+		return -1;
+	}
+
+	osi_memcpy(sc.sci, sci, OSI_SCI_LEN);
+	sc_info = find_existing_sc(osi_core, &sc, ctlr);
+	if (sc_info == OSI_NULL) {
+		OSI_CORE_ERR(osi_core->osd, OSI_LOG_ARG_HW_FAIL,
+			     "SCI Not found\n", 0ULL);
+		return -1;
+	}
+
+	*key_index = (sc_info->sc_idx_start * OSI_MAX_NUM_SA);
+	return 0;
+}
+
 static nve32_t del_upd_sc(struct osi_core_priv_data *const osi_core,
 		      struct osi_macsec_sc_info *existing_sc,
 		      struct osi_macsec_sc_info *const sc,
@@ -3107,6 +3133,7 @@ static struct osi_macsec_core_ops macsec_ops = {
 	.read_mmc = macsec_read_mmc,
 	.dbg_buf_config = macsec_dbg_buf_config,
 	.dbg_events_config = macsec_dbg_events_config,
+	.get_sc_lut_key_index = macsec_get_sc_lut_key_index,
 };
 
 /**
@@ -3178,6 +3205,19 @@ nve32_t osi_macsec_lut_config(struct osi_core_priv_data *const osi_core,
 	return -1;
 }
 
+nve32_t osi_macsec_get_sc_lut_key_index(struct osi_core_priv_data *const osi_core,
+					nveu8_t *sci, nve32_t *key_index,
+					nveu16_t ctlr)
+{
+	if (osi_core != OSI_NULL && osi_core->macsec_ops != OSI_NULL &&
+			osi_core->macsec_ops->get_sc_lut_key_index != OSI_NULL) {
+		return osi_core->macsec_ops->get_sc_lut_key_index(osi_core, sci, key_index,
+								  ctlr);
+	}
+
+	return -1;
+}
+
 #ifdef MACSEC_KEY_PROGRAM
 nve32_t osi_macsec_kt_config(struct osi_core_priv_data *const osi_core,
 			 struct osi_macsec_kt_config *const kt_config)