diff --git a/cmd/main.go b/cmd/main.go
index 770cff3..e92d641 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -8,6 +8,7 @@ import (
 	"StoreBackEnd/pkg/protocol/rules/readers"
 	"StoreBackEnd/pkg/protocol/rules/writers"
 	"StoreBackEnd/pkg/utils"
+	"log"
 	"time"
 )
 
@@ -16,6 +17,11 @@ const (
 )
 
 func main() {
+	hash, err := utils.HashFileCompare("D:\\HELMoCrypted.png", "bacf89bd47be38ac445d5519c4e945bbea79c4a1f250cb31579e331e67941939")
+	if err != nil {
+		log.Fatal(err)
+	}
+	println("Hash : ", hash)
 	utils.NetworkLister() // TODO REMOVE
 	println("StoreBackEnd started !")
 
diff --git a/pkg/protocol/rules/readers/RetrieveFileRule.go b/pkg/protocol/rules/readers/RetrieveFileRule.go
index 6b080f9..b83780b 100644
--- a/pkg/protocol/rules/readers/RetrieveFileRule.go
+++ b/pkg/protocol/rules/readers/RetrieveFileRule.go
@@ -40,16 +40,17 @@ func (rule RetrieveFileRule) GetCmd() string {
 }
 
 func (rule RetrieveFileRule) Execute(data string) (*protocol.ProtocolWriterResult, func(reader *bufio.Reader) *protocol.ProtocolWriterResult) {
-
 	if rule.Match(data) {
 		values := rule.matcher.Parse(data)
 		hashFileName := values[1]
 
 		path := fmt.Sprintf("%s/%s", rule.storagePath, hashFileName)
 		if fileinfo, err := os.Stat(path); err == nil {
-			println("OKOKOKOEKOEKE : ", hashFileName, fmt.Sprintf("%d", fileinfo.Size()), fmt.Sprintf("%x", utils.GenFingerPrint(path)))
-
-			return rule.protocolRepo.ExecuteWriter(writers.RetrieveOkRulePrefix, hashFileName, fmt.Sprintf("%d", fileinfo.Size()), fmt.Sprintf("%x", utils.GenFingerPrint(path))), nil
+			// Retrieve fingerprint sha256
+			fileFingerprint, err := utils.HashFile(path)
+			if err == nil {
+				return rule.protocolRepo.ExecuteWriter(writers.RetrieveOkRulePrefix, hashFileName, fmt.Sprintf("%d", fileinfo.Size()), fileFingerprint), nil
+			}
 		}
 	}
 	return rule.protocolRepo.ExecuteWriter(writers.RetrieveErrorRulePrefix), nil
diff --git a/pkg/protocol/rules/readers/SendFileRule.go b/pkg/protocol/rules/readers/SendFileRule.go
index 7e8f21d..5669350 100644
--- a/pkg/protocol/rules/readers/SendFileRule.go
+++ b/pkg/protocol/rules/readers/SendFileRule.go
@@ -65,16 +65,14 @@ func (rule SendFileRule) onRead(fileName string, fileSize int, fingerPrint strin
 
 	return func(reader *bufio.Reader) *protocol.ProtocolWriterResult {
 		path := fmt.Sprintf("%s/%s", rule.storagePath, fileName)
-		hasReceive := utils.ReceiveFile(path, fileSize, reader)
-
-		// println("OK ", utils.HashFileCompare(path, fingerPrint))
-
-		if !hasReceive {
-			os.Remove(path) // Suppression du fichier
-			return rule.protocolRepo.ExecuteWriter(writers.SendErrorRulePrefix)
-		} else {
-			return rule.protocolRepo.ExecuteWriter(writers.SendOkRulePrefix)
+		if utils.ReceiveFile(path, fileSize, reader) {
+			hashCompare, err := utils.HashFileCompare(path, fingerPrint)
+			if err == nil && hashCompare {
+				return rule.protocolRepo.ExecuteWriter(writers.SendOkRulePrefix)
+			}
 		}
+		os.Remove(path)
+		return rule.protocolRepo.ExecuteWriter(writers.SendErrorRulePrefix)
 	}
 }
 
diff --git a/pkg/utils/FileReceiver.go b/pkg/utils/FileReceiver.go
index aaac2fe..a966c03 100644
--- a/pkg/utils/FileReceiver.go
+++ b/pkg/utils/FileReceiver.go
@@ -18,6 +18,7 @@ func ReceiveFile(path string, fileSize int, reader *bufio.Reader) bool {
 	buffer := make([]byte, 1024)
 	currentSize := 0
 
+	// Copy file
 	b, done := copyFile(currentSize, fileSize, reader, buffer, file)
 	if done {
 		return b
diff --git a/pkg/utils/Hasher.go b/pkg/utils/Hasher.go
deleted file mode 100644
index 36e03b2..0000000
--- a/pkg/utils/Hasher.go
+++ /dev/null
@@ -1,34 +0,0 @@
-package utils
-
-import (
-	"bufio"
-	"crypto/sha256"
-	"fmt"
-	"io"
-	"log"
-	"os"
-)
-
-func HashFileCompare(path string, fingerPrint string) bool {
-	sum := GenFingerPrint(path)
-
-	return fingerPrint == fmt.Sprintf("%x", sum)
-}
-
-func GenFingerPrint(path string) []byte {
-	f, err := os.Open(path)
-	if err != nil {
-		log.Fatal(err)
-	}
-	defer f.Close()
-
-	input := bufio.NewReader(f)
-
-	hash := sha256.New()
-	if _, err := io.Copy(hash, input); err != nil {
-		log.Fatal(err)
-	}
-	sum := hash.Sum(nil)
-
-	return sum
-}
diff --git a/pkg/utils/SHA.go b/pkg/utils/SHA.go
new file mode 100644
index 0000000..80fe877
--- /dev/null
+++ b/pkg/utils/SHA.go
@@ -0,0 +1,52 @@
+package utils
+
+/**
+ * SHA-256 Hashing Class
+ *
+ * @author 			Jérémi N <contact@enmove.eu>
+ * @version 		1.0
+ */
+import (
+	"bufio"
+	"crypto/sha256"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+// HashStream Make a fingerprint of a stream.
+func HashStream(in *bufio.Reader) (string, error) {
+	sha := sha256.New()
+	if _, err := io.Copy(sha, in); err != nil {
+		return "", errors.New("unable to copy data into hashing system")
+	}
+	return fmt.Sprintf("%x", sha.Sum(nil)), nil
+}
+
+// HashFile Make a fingerprint of a file content.
+func HashFile(filePath string) (string, error) {
+	file, err := os.Open(filePath)
+	if err != nil {
+		return "", err
+	}
+	defer file.Close()
+	hash, err := HashStream(bufio.NewReader(file))
+	if err != nil {
+		return "", err
+	}
+	return hash, nil
+}
+
+// HashFileCompare Make a fingerprint of a file and compare with the renseigned fingerprint.
+func HashFileCompare(filePath string, fingerprint string) (bool, error) {
+	fileFingerprint, err := HashFile(filePath)
+	if err != nil {
+		return false, err
+	}
+	if strings.Compare(fileFingerprint, fingerprint) == 0 {
+		return true, nil
+	}
+	return false, nil
+}
diff --git a/resources/AppConfig.json b/resources/AppConfig.json
index 7c7aaa1..035cc65 100644
--- a/resources/AppConfig.json
+++ b/resources/AppConfig.json
@@ -2,7 +2,7 @@
   "multicastNetworkInterface": "Loopback Pseudo-Interface 1",
   "multicastAddress": "224.66.66.1:15502",
   "multicastSecond": 30,
-  "domain": "org.lightcont01",
+  "domain": "orglightcont01",
   "unicastPort": 58000,
   "storagePath": "D:\\sbe"
 }
\ No newline at end of file