diff --git a/TimetableDesigner.Backend.Services.Authentication/DTO/Validators/RegisterRequestValidator.cs b/TimetableDesigner.Backend.Services.Authentication/API/Validators/RegisterRequestValidator.cs
similarity index 100%
rename from TimetableDesigner.Backend.Services.Authentication/DTO/Validators/RegisterRequestValidator.cs
rename to TimetableDesigner.Backend.Services.Authentication/API/Validators/RegisterRequestValidator.cs
diff --git a/TimetableDesigner.Backend.Services.Authentication/Application/Commands/Register/RegisterDto.cs b/TimetableDesigner.Backend.Services.Authentication/Application/Commands/Register/RegisterData.cs
similarity index 100%
rename from TimetableDesigner.Backend.Services.Authentication/Application/Commands/Register/RegisterDto.cs
rename to TimetableDesigner.Backend.Services.Authentication/Application/Commands/Register/RegisterData.cs
diff --git a/TimetableDesigner.Backend.Services.Authentication/Application/Commands/Register/RegisterMappers.cs b/TimetableDesigner.Backend.Services.Authentication/Application/Commands/Register/RegisterMappers.cs
new file mode 100644
index 0000000..3317d95
--- /dev/null
+++ b/TimetableDesigner.Backend.Services.Authentication/Application/Commands/Register/RegisterMappers.cs
@@ -0,0 +1,10 @@
+using TimetableDesigner.Backend.Services.Authentication.Application.Commands.Register;
+using TimetableDesigner.Backend.Services.Authentication.DTO.API;
+
+namespace TimetableDesigner.Backend.Services.Authentication.DTO.Mappers;
+
+public static class RegisterMappers
+{
+    public static RegisterCommand ToCommand(this RegisterRequest request) =>
+        new RegisterCommand(request.Email, request.Password);
+}
\ No newline at end of file
diff --git a/TimetableDesigner.Backend.Services.Authentication/Application/Helpers/IPasswordHasher.cs b/TimetableDesigner.Backend.Services.Authentication/Application/Helpers/IPasswordHasher.cs
new file mode 100644
index 0000000..36e1119
--- /dev/null
+++ b/TimetableDesigner.Backend.Services.Authentication/Application/Helpers/IPasswordHasher.cs
@@ -0,0 +1,7 @@
+namespace TimetableDesigner.Backend.Services.Authentication.Application.Helpers;
+
+public interface IPasswordHasher
+{
+    PasswordHashData CreateHash(string password);
+    byte[] ComputeHash(string password, string salt);
+}
\ No newline at end of file
diff --git a/TimetableDesigner.Backend.Services.Authentication/Application/Helpers/PasswordHashData.cs b/TimetableDesigner.Backend.Services.Authentication/Application/Helpers/PasswordHashData.cs
new file mode 100644
index 0000000..cb01f57
--- /dev/null
+++ b/TimetableDesigner.Backend.Services.Authentication/Application/Helpers/PasswordHashData.cs
@@ -0,0 +1,7 @@
+namespace TimetableDesigner.Backend.Services.Authentication.Application.Helpers;
+
+public record PasswordHashData(
+    byte[] Hash,
+    string LeftSalt,
+    string RightSalt
+);
\ No newline at end of file
diff --git a/TimetableDesigner.Backend.Services.Authentication/Application/Helpers/PasswordHasher.cs b/TimetableDesigner.Backend.Services.Authentication/Application/Helpers/PasswordHasher.cs
new file mode 100644
index 0000000..96f7d5c
--- /dev/null
+++ b/TimetableDesigner.Backend.Services.Authentication/Application/Helpers/PasswordHasher.cs
@@ -0,0 +1,6 @@
+namespace TimetableDesigner.Backend.Services.Authentication.Application.Helpers;
+
+public class PasswordHasher
+{
+    
+}
\ No newline at end of file