diff --git a/aes/ta/aes_ta.c b/aes/ta/aes_ta.c
index 0814464..b259a01 100644
--- a/aes/ta/aes_ta.c
+++ b/aes/ta/aes_ta.c
@@ -260,13 +260,13 @@
 	 * - reset transient object and load attribute data
 	 *   TEE_ResetTransientObject()
 	 *   TEE_PopulateTransientObject()
-	 * - load the key (transient object) into the cihering operation
+	 * - load the key (transient object) into the ciphering operation
 	 *   TEE_SetOperationKey()
 	 *
 	 * TEE_SetOperationKey() requires operation to be in "initial state".
 	 * We can use TEE_ResetOperation() to reset the operation but this
-	 * api cannot be used on operation with key(s) not yet set. Hence,
-	 * when allocating the operation handle, we prevovision a dummy key.
+	 * API cannot be used on operation with key(s) not yet set. Hence,
+	 * when allocating the operation handle, we load a dummy key.
 	 * Thus, set_key sequence always reset then set key on operation.
 	 */
 
diff --git a/aes/ta/include/aes_ta.h b/aes/ta/include/aes_ta.h
index ecdddb6..a711326 100644
--- a/aes/ta/include/aes_ta.h
+++ b/aes/ta/include/aes_ta.h
@@ -63,7 +63,7 @@
 
 /*
  * TA_AES_CMD_SET_IV - reset IV
- * param[0] (memref) initial vector, size shall equal key length
+ * param[0] (memref) initial vector, size shall equal block length
  * param[1] unused
  * param[2] unused
  * param[3] unused
@@ -71,7 +71,7 @@
 #define TA_AES_CMD_SET_IV		2
 
 /*
- * TA_AES_CMD_CIPHER - Ciphere inut buffer into output buffer
+ * TA_AES_CMD_CIPHER - Cipher input buffer into output buffer
  * param[0] (memref) input buffer
  * param[1] (memref) output buffer (shall be bigger than input buffer)
  * param[2] unused