diff --git a/src/main/java/ru/soune/nocopy/controller/ApiController.java b/src/main/java/ru/soune/nocopy/controller/ApiController.java
index 57cca1e..d604b1e 100644
--- a/src/main/java/ru/soune/nocopy/controller/ApiController.java
+++ b/src/main/java/ru/soune/nocopy/controller/ApiController.java
@@ -376,6 +376,24 @@ public class ApiController {
         }
     }
 
+    @GetMapping("/protect/{fileId}")
+    public ResponseEntity<?> protect( @PathVariable(required = false) String fileId) {
+        Optional<FileEntity> optionalFileEntity = fileEntityRepository.findById(fileId);
+
+        if (!optionalFileEntity.isPresent()) {
+            return ResponseEntity.notFound().build();
+        }
+        FileEntity fileEntity = optionalFileEntity.get();
+        FileProtector.FileInfo fileInfo = fileUtil.createFileInfo(fileEntity);
+
+        noCopyFileService.addFile(fileInfo);
+
+        fileEntity.setProtectionStatus(ProtectionStatus.PROCESSING);
+        fileEntityRepository.save(fileEntity);
+
+        return ResponseEntity.ok().build();
+    }
+
     @GetMapping("/check/{fileId}/{type}")
     public ResponseEntity<?> check(@PathVariable(required = false) String fileId,
                                    @PathVariable(required = false) String type) {
diff --git a/src/main/java/ru/soune/nocopy/service/FileSimilarityService.java b/src/main/java/ru/soune/nocopy/service/FileSimilarityService.java
index 6e3bf8d..8b5449d 100644
--- a/src/main/java/ru/soune/nocopy/service/FileSimilarityService.java
+++ b/src/main/java/ru/soune/nocopy/service/FileSimilarityService.java
@@ -8,15 +8,13 @@ import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 import ru.soune.nocopy.dto.file.SimilarFileDTO;
 import ru.soune.nocopy.dto.file.SimilarityFilter;
+import ru.soune.nocopy.entity.file.ImageHashEntity;
 import ru.soune.nocopy.repository.ImageHashRepository;
 import ru.soune.nocopy.repository.ImageSimilarityRepository;
 import ru.soune.nocopy.repository.SimilarImageProjection;
 import ru.soune.nocopy.util.FileUtil;
 
-import java.util.AbstractMap;
-import java.util.ArrayList;
-import java.util.Comparator;
-import java.util.List;
+import java.util.*;
 import java.util.stream.Collectors;
 
 @Service
@@ -73,8 +71,13 @@ public class FileSimilarityService {
                                                                int duplicate, int similar) {
         List<SimilarImageProjection> candidates = repository.findCandidates(fileId);
 
-        var imageHashEntity = hashRepository.findById(fileId)
-                .orElseThrow(() -> new RuntimeException("Hash not found"));
+        Optional<ImageHashEntity> hashOptional = hashRepository.findById(fileId);
+
+        if (hashOptional.isEmpty()) {
+            return Collections.emptyList();
+        }
+
+        var imageHashEntity = hashOptional.get();
 
         Long hash64Hi = imageHashEntity.getHash64Hi();
         Long hash64Lo = imageHashEntity.getHash64Lo();