diff --git a/native/ios/Comm/TemporalMessageStorage/EncryptedFileUtils.mm b/native/ios/Comm/TemporalMessageStorage/EncryptedFileUtils.mm
--- a/native/ios/Comm/TemporalMessageStorage/EncryptedFileUtils.mm
+++ b/native/ios/Comm/TemporalMessageStorage/EncryptedFileUtils.mm
@@ -10,3 +10,79 @@
 + (NSData *)_encryptData:(NSString *)data error:(NSError **)error;
 + (NSString *)_decryptData:(NSString *)data error:(NSError **)error;
 @end
+
+@implementation EncryptedFileUtils
++ (NSData *)_encryptData:(NSString *)data error:(NSError **)error {
+  NSData *encryptedData = [EncryptedFileUtils
+      _runCryptor:[data dataUsingEncoding:NSUTF8StringEncoding]
+        operation:kCCEncrypt
+            error:error];
+  if (!encryptedData) {
+    return nil;
+  }
+  return [encryptedData base64EncodedDataWithOptions:0];
+}
+
++ (NSString *)_decryptData:(NSString *)data error:(NSError **)error {
+  NSData *base64DecodedData = [[NSData alloc] initWithBase64EncodedString:data
+                                                                  options:0];
+  NSString *decryptedData = [[NSString alloc]
+      initWithData:[EncryptedFileUtils _runCryptor:base64DecodedData
+                                         operation:kCCDecrypt
+                                             error:error]
+          encoding:NSUTF8StringEncoding];
+  if (!decryptedData) {
+    return nil;
+  }
+  return decryptedData;
+}
+
++ (NSData *)_runCryptor:(NSData *)binary
+              operation:(CCOperation)operation
+                  error:(NSError **)err {
+  NSString *keyString =
+      [[CommSecureStoreIOSWrapper sharedInstance] get:@"comm.encryptionKey"];
+  if (!keyString) {
+    *err = [NSError
+        errorWithDomain:@"app.comm"
+                   code:NSCoderValueNotFoundError
+               userInfo:@{
+                 NSLocalizedDescriptionKey : @"Encryption key not created yet"
+               }];
+    return nil;
+  }
+
+  NSUInteger AES256KeyByteCount = 32;
+  NSData *key = [[keyString substringToIndex:AES256KeyByteCount]
+      dataUsingEncoding:NSUTF8StringEncoding];
+  NSMutableData *resultBinary =
+      [NSMutableData dataWithLength:binary.length + kCCBlockSizeAES128];
+
+  size_t processedBytes = 0;
+  CCCryptorStatus ccStatus = CCCrypt(
+      operation,
+      kCCAlgorithmAES,
+      kCCOptionPKCS7Padding,
+      key.bytes,
+      key.length,
+      nil,
+      binary.bytes,
+      binary.length,
+      resultBinary.mutableBytes,
+      resultBinary.length,
+      &processedBytes);
+
+  resultBinary.length = processedBytes;
+  if (ccStatus != kCCSuccess) {
+    *err = [NSError
+        errorWithDomain:@"app.comm"
+                   code:ccStatus
+               userInfo:@{
+                 NSLocalizedDescriptionKey : @"Cryptographic operation failed"
+               }];
+    return nil;
+  }
+  return resultBinary;
+}
+
+@end