diff --git a/README.md b/README.md
index 443229c..be5bf04 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# RED_CRYPTO ver 0.5.0
+# RED_CRYPTO ver 0.6.0
 
 ## Description
 
diff --git a/kuznechik_8bit.c b/kuznechik_8bit.c
index 958dd55..9f8848a 100644
--- a/kuznechik_8bit.c
+++ b/kuznechik_8bit.c
@@ -264,6 +264,13 @@ void print_w128(w128_t *x)
 	printf("\n");
 };
 
+void print_chars_w128(w128_t *x) {
+    for (uint8_t i = 0; i < 16; i++) {
+        if (x->b[i] == 0x00) break;
+        printf("%c", x->b[i]);
+    }
+    printf("\n");
+};
 
 /*********************** TEST FUNCTION DEFINITIONS ***********************/
 #ifdef TEST_FUNCTIONS_ENABLED
diff --git a/kuznechik_8bit.h b/kuznechik_8bit.h
index 686e63f..d3635d1 100644
--- a/kuznechik_8bit.h
+++ b/kuznechik_8bit.h
@@ -32,6 +32,7 @@ void kuz_decrypt_block(kuz_key_t *subkeys, void *x);
 
 // utils
 void print_w128(w128_t *x);
+void print_chars_w128(w128_t *x);
 
 // tests
 #ifdef TEST_FUNCTIONS_ENABLED
diff --git a/red_crypto.c b/red_crypto.c
index 4ce6381..be2d334 100644
--- a/red_crypto.c
+++ b/red_crypto.c
@@ -24,42 +24,6 @@ uint8_t count_char_key = 0;
 
 uint8_t crypto_mode = 0;
 
-void print_chars_w128(w128_t *x) {
-    for (uint8_t i = 0; i < 16; i++) {
-        if (x->b[i] == 0x00) break;
-        dprintf("%c", x->b[i]);
-    }
-    dprintf("\n");
-};
-
-void print_chars(uint8_t *c) {
-    for (uint8_t i = 0; i < 32; i++) {
-        if (c[i] == 0x00) break;
-        dprintf("%c", c[i]);
-    }
-    dprintf("\n");
-};
-
-void print_int(uint8_t *c) {
-    for (uint8_t i = 0; i < 32; i++) {
-        dprintf("%d", c[i]);
-    }
-    dprintf("\n");
-};
-
-void print_hex(uint8_t *h) {
-    for (uint8_t i = 0; i < 32; i++) {
-        dprintf("%x ", h[i]);
-    }
-    dprintf("\n");
-};
-
-size_t min_len(size_t a, size_t b) {
-    if (a < b)
-        return a;
-    else
-        return b;
-}
 
 void decrypt_pass_kuzn(const uint8_t encrypted_passwords[STORAGE_SIZE][STORAGE_PASS_LEN]) {
     kuz_key_t key;
diff --git a/red_crypto.h b/red_crypto.h
index 741ef3c..8734b6a 100644
--- a/red_crypto.h
+++ b/red_crypto.h
@@ -6,7 +6,9 @@
 #ifndef RED_CRYPTO_H
 #    define RED_CRYPTO_H
 
+// includes of red_crypto
 #    include "kc_to_ascii.h"
+#    include "utils.h"
 
 // #ifdef USE_RED_KUZNECHIK_128
 // #include "kuznechik_128bit.h"
@@ -39,20 +41,30 @@
 #        define STORAGE_PASS_LEN 64
 #    endif
 
-
-//example for encrypted 64 byte password
-// const uint8_t red_enc_pass[STORAGE_SIZE][STORAGE_PASS_LEN] = {
-//     {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-//      0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-//      0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 
-//      0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
-// };
+// example for encrypted 64 byte password
+//  const uint8_t red_enc_pass[STORAGE_SIZE][STORAGE_PASS_LEN] = {
+//      {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+//       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+//       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+//       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
+//  };
 
 enum red_crypto_keys {
     RED_CRY_M = SAFE_RANGE + 0x80, // added safe range offset
     RED_RNG,
     RED_TEST,
-    RED_PASS1, RED_PASS2, RED_PASS3, RED_PASS4, RED_PASS5, RED_PASS6, RED_PASS7, RED_PASS8, RED_PASS9, RED_PASS10, RED_PASS11, RED_PASS12
+    RED_PASS1,
+    RED_PASS2,
+    RED_PASS3,
+    RED_PASS4,
+    RED_PASS5,
+    RED_PASS6,
+    RED_PASS7,
+    RED_PASS8,
+    RED_PASS9,
+    RED_PASS10,
+    RED_PASS11,
+    RED_PASS12
 };
 
 uint8_t crypto_process_record_user(uint16_t keycode, keyrecord_t *record, const uint8_t encrypted_passwords[STORAGE_SIZE][STORAGE_PASS_LEN]);
diff --git a/red_crypto.mk b/red_crypto.mk
index 78e5997..6a7c0e7 100644
--- a/red_crypto.mk
+++ b/red_crypto.mk
@@ -5,6 +5,7 @@ SRC += red_crypto/sha256.c
 SRC += red_crypto/aes.c
 SRC += red_crypto/kuznechik_8bit.c
 SRC += red_crypto/kc_to_ascii.c
+SRC += red_crypto/utils.c
 
 # SRC += red_crypto/kuznechik_128bit.c # you can't include this, because you may not have ARMv8 and upper, check this
 # TODO: do something like this: