diff --git a/trial3/layer1.c b/trial3/layer1.c
index 781a92a..e62b3cc 100644
--- a/trial3/layer1.c
+++ b/trial3/layer1.c
@@ -180,4 +180,49 @@ int _calcCDIKEY(uint8_t * CDIKEY)
   free(KEYIN);
 
   return RIOTSUCCESS;
-}
\ No newline at end of file
+}
+
+int deriveECCKeyPair(mbedtls_mpi * SK, mbedtls_ecp_point * PK)
+{
+
+	printf("inside deriveECCKeyPair layer1\n\n");
+
+	mbedtls_ecp_group ecpGrp;
+    mbedtls_ecp_group_init(&ecpGrp);
+    mbedtls_ecp_group_load(&ecpGrp, ECC_CURVE);
+
+    mbedtls_mpi secret;
+    mbedtls_mpi_init(&secret);
+
+    mbedtls_ecp_point Public;
+    mbedtls_ecp_point_init(&Public);
+
+    mbedtls_entropy_context entropyCtx;
+    mbedtls_entropy_init(&entropyCtx);
+
+    mbedtls_ctr_drbg_context drbgCtx;
+    mbedtls_ctr_drbg_init(&drbgCtx);
+
+    //Seed drbg with secret data now?
+
+    int ret = mbedtls_ctr_drbg_seed(&drbgCtx, mbedtls_entropy_func, &entropyCtx,
+    				(const unsigned char *) "Private", sizeof("Private"));
+
+    ret = mbedtls_ecp_gen_keypair(&ecpGrp, &secret, &Public, 
+    				mbedtls_ctr_drbg_random, &drbgCtx);
+
+    mbedtls_ecp_copy(PK, &Public);
+    mbedtls_mpi_copy(SK, &secret);
+
+    mbedtls_mpi_free(&secret);
+    mbedtls_ecp_point_free(&Public);
+    mbedtls_ecp_group_free(&ecpGrp);
+    mbedtls_entropy_free(&entropyCtx);
+   	mbedtls_ctr_drbg_free(&drbgCtx);
+
+   	printf("leaving deriveECCKeyPair layer1\n\n");
+
+    return 0;
+}
+
+int deriveRSAKeyPair(void){return 0;}
\ No newline at end of file
diff --git a/trial3/layer1.h b/trial3/layer1.h
index baeddd0..43a46b4 100644
--- a/trial3/layer1.h
+++ b/trial3/layer1.h
@@ -1,11 +1,16 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-
-#include <mbedtls/hkdf.h>
+#include <mbedtls/bignum.h>
+#include <mbedtls/entropy.h>
+#include <mbedtls/ctr_drbg.h>
 #include <mbedtls/hmac_drbg.h>
+#include <mbedtls/ecp.h>
+#include <mbedtls/ecdh.h>
+#include <mbedtls/ecdsa.h>
 #include <mbedtls/hkdf.h>
 #include <mbedtls/md.h>
+#include <mbedtls/aes.h>
 #include <mbedtls/sha1.h>
 #include <mbedtls/sha256.h>
 
@@ -17,4 +22,6 @@
 int readUDS(uint8_t* UDSdigest);
 int readFWID(uint8_t * FW_M);
 int _calcCDID(uint8_t * CDID);
-int _calcCDIKEY(uint8_t * CDIKEY);
\ No newline at end of file
+int _calcCDIKEY(uint8_t * CDIKEY);
+int deriveECCKeyPair(mbedtls_mpi * SK, mbedtls_ecp_point * PK);
+int deriveRSAKeyPair(void);
\ No newline at end of file
diff --git a/trial3/layer2.c b/trial3/layer2.c
index 5dfff3e..bbe7132 100644
--- a/trial3/layer2.c
+++ b/trial3/layer2.c
@@ -60,30 +60,36 @@ void deriveDeviceIDKeyPair(uint8_t * CDIKEY, int isECC)
   { 
 
 
-    mbedtls_ecp_group ecpGrp;
-    mbedtls_ecp_group_init(&ecpGrp);
-    mbedtls_ecp_group_load(&ecpGrp, ECC_CURVE);
+    // mbedtls_ecp_group ecpGrp;
+    // mbedtls_ecp_group_init(&ecpGrp);
+    // mbedtls_ecp_group_load(&ecpGrp, ECC_CURVE);
 
-    mbedtls_mpi secret;
+    // mbedtls_mpi secret;
+    // mbedtls_mpi_init(&secret);
+
+    // mbedtls_ecp_point Public;
+    // mbedtls_ecp_point_init(&Public);
+
+    // mbedtls_entropy_context entropyCtx;
+    // mbedtls_entropy_init(&entropyCtx);
+
+    // mbedtls_ctr_drbg_context drbgCtx;
+    // mbedtls_ctr_drbg_init(&drbgCtx);
+
+    // int ret = mbedtls_ctr_drbg_seed(&drbgCtx, mbedtls_entropy_func, &entropyCtx,
+    // 				(const unsigned char *) "Private", sizeof("Private"));
+
+    // ret = mbedtls_ecp_gen_keypair(&ecpGrp, &secret, &Public, 
+    // 				mbedtls_ctr_drbg_random, &drbgCtx);
+
+
+  	mbedtls_mpi secret;
     mbedtls_mpi_init(&secret);
 
     mbedtls_ecp_point Public;
     mbedtls_ecp_point_init(&Public);
 
-    mbedtls_entropy_context entropyCtx;
-    mbedtls_entropy_init(&entropyCtx);
-
-    mbedtls_ctr_drbg_context drbgCtx;
-    mbedtls_ctr_drbg_init(&drbgCtx);
-
-
-    int ret = mbedtls_ctr_drbg_seed(&drbgCtx, mbedtls_entropy_func, &entropyCtx,
-    				(const unsigned char *) "Private", sizeof("Private"));
-
-    ret = mbedtls_ecp_gen_keypair(&ecpGrp, &secret, &Public, 
-    				mbedtls_ctr_drbg_random, &drbgCtx);
-
-
+    deriveECCKeyPair(&secret, &Public);b 
 
     return;
   }
diff --git a/trial3/out/main b/trial3/out/main
index 03f69eb..a9ecfe1 100755
Binary files a/trial3/out/main and b/trial3/out/main differ