diff --git a/src/main/java/cipher_analytical_machine/ciphers/caesar/Decrypted.java b/src/main/java/cipher_analytical_machine/ciphers/caesar/Decrypted.java
new file mode 100644
index 0000000..1b86df2
--- /dev/null
+++ b/src/main/java/cipher_analytical_machine/ciphers/caesar/Decrypted.java
@@ -0,0 +1,6 @@
+package cipher_analytical_machine.ciphers.caesar;
+
+public interface Decrypted {
+    String decrypt(String message, int key, String symbols);
+}
+