diff --git a/src/utils/crypto.ts b/src/utils/crypto.ts
index c974c29..dc55c47 100644
--- a/src/utils/crypto.ts
+++ b/src/utils/crypto.ts
@@ -1,4 +1,9 @@
-import { hexToString, stringToHex } from '.'
+import {
+  hexStringToUint8Array,
+  hexToString,
+  stringToHex,
+  uint8ArrayToHexString
+} from '.'
 
 const ENCRYPTION_ALGO_NAME = 'AES-GCM'
 
@@ -14,7 +19,7 @@ export const generateEncryptionKey = async () => {
   const jsonString = JSON.stringify(key)
   const hexKey = stringToHex(jsonString)
 
-  const iv = new TextDecoder().decode(
+  const iv = uint8ArrayToHexString(
     window.crypto.getRandomValues(new Uint8Array(16))
   )
 
@@ -25,7 +30,7 @@ export const importKey = async (key: string) => {
   const splittedKey = key.split('?iv=')
   const keyString = hexToString(splittedKey[0])
   const jsonWebKey = JSON.parse(keyString)
-  const iv = new TextEncoder().encode(splittedKey[1])
+  const iv = hexStringToUint8Array(splittedKey[1])
 
   const cryptoKey = await window.crypto.subtle.importKey(
     'jwk',
diff --git a/src/utils/string.ts b/src/utils/string.ts
index e0e8fea..c2007b5 100644
--- a/src/utils/string.ts
+++ b/src/utils/string.ts
@@ -37,3 +37,25 @@ export const hexToString = (hex: string) => {
   // Join the resulting characters into a single string
   return chars.join('')
 }
+
+// Function to convert a Uint8Array to a hexadecimal string
+export const uint8ArrayToHexString = (uint8Array: Uint8Array) => {
+  // Convert each byte in the Uint8Array to a hexadecimal string,
+  // pad it with leading zeros if necessary, and join the results
+  return Array.from(uint8Array)
+    .map((byte) => byte.toString(16).padStart(2, '0')) // Convert byte to hexadecimal string
+    .join('') // Join all hexadecimal strings
+}
+
+// Function to convert a hexadecimal string to a Uint8Array
+export const hexStringToUint8Array = (hexString: string) => {
+  // Create a new Uint8Array with half the length of the hex string
+  const uint8Array = new Uint8Array(hexString.length / 2)
+  // Iterate over pairs of characters in the hex string
+  for (let i = 0; i < hexString.length; i += 2) {
+    // Parse the pair of characters as a hexadecimal value and store it in the Uint8Array
+    uint8Array[i / 2] = parseInt(hexString.substr(i, 2), 16)
+  }
+  // Return the resulting Uint8Array
+  return uint8Array
+}