diff --git a/Nibriboard/Userspace/User.cs b/Nibriboard/Userspace/User.cs
index 5beef87..c5a4ba6 100644
--- a/Nibriboard/Userspace/User.cs
+++ b/Nibriboard/Userspace/User.cs
@@ -1,23 +1,60 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-
+using System.Runtime.Serialization;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
 using SimpleHashing.Net;
 
 namespace Nibriboard.Userspace
 {
+	/// <summary>
+	/// Creates new <see cref="User" /> class instances for Newtonsoft.json.
+	/// </summary>
+	public class UserCreationConverter : CustomCreationConverter<User>
+	{
+		private UserManager userManager;
+		public UserCreationConverter(UserManager inUserManager)
+		{
+			userManager = inUserManager;
+		}
+
+		public override User Create(Type objectType)
+		{
+			return new User(userManager);
+		}
+	}
+
+	/// <summary>
+	/// Represents a single Nibriboard user.
+	/// </summary>
+	[JsonObject(MemberSerialization.OptOut)]
 	public class User
 	{
 		private static ISimpleHash passwordHasher = new SimpleHash();
 
+		private UserManager userManager;
+
 		public DateTime CreationTime { get; set; }
 		public string Username { get; set; }
 		public string HashedPassword { get; set; }
 
+		[JsonIgnore]
 		public List<RbacRole> Roles { get; set; }
 
-		public User()
+		private List<string> rolesText = null;
+		public List<string> RolesText {
+			get {
+				return new List<string>(Roles.Select((RbacRole role) => role.Name));
+			}
+			set {
+
+			}
+		}
+
+		public User(UserManager inUserManager)
 		{
+			userManager = inUserManager;
 		}
 
 		/// <summary>
@@ -47,5 +84,11 @@ namespace Nibriboard.Userspace
 		{
 			return Roles.Any((RbacRole role) => role.HasPermission(permission));
 		}
+
+		[OnDeserialized]
+		internal void OnDeserialized(StreamingContext context)
+		{
+			Roles = new List<RbacRole>(userManager.ResolveRoles(RolesText));
+		}
 	}
 }
diff --git a/Nibriboard/Userspace/UserManager.cs b/Nibriboard/Userspace/UserManager.cs
index 876cfe5..833460f 100644
--- a/Nibriboard/Userspace/UserManager.cs
+++ b/Nibriboard/Userspace/UserManager.cs
@@ -1,5 +1,9 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using Newtonsoft.Json;
 
 namespace Nibriboard.Userspace
 {
@@ -22,32 +26,49 @@ namespace Nibriboard.Userspace
 				new RbacPermission("manage-any-plane-members", "Manage the users allowed to access one any plane.")
 			});
 			Roles.Add(new RbacRole("Guest", new List<RbacPermission>() {
-				GetPermission("view-public-plane")
+				ResolvePermission("view-public-plane")
 			}));
 			Roles.Add(new RbacRole("Member", new List<RbacPermission>() {
-				GetPermission("view-own-plane"),
-				GetPermission("create-plane"),
-				GetPermission("delete-own-plane"),
-				GetPermission("manage-own-plane-members")
+				ResolvePermission("view-own-plane"),
+				ResolvePermission("create-plane"),
+				ResolvePermission("delete-own-plane"),
+				ResolvePermission("manage-own-plane-members")
 			}, new List<RbacRole>() {
-				GetRole("Guest")
+				ResolveRole("Guest")
 			}));
 			Roles.Add(new RbacRole("Root", new List<RbacPermission>() {
-				GetPermission("view-any-plane"),
-				GetPermission("delete-any-plane"),
-				GetPermission("manage-any-plane-members")
+				ResolvePermission("view-any-plane"),
+				ResolvePermission("delete-any-plane"),
+				ResolvePermission("manage-any-plane-members")
 			}, new List<RbacRole>() {
-				GetRole("Member")
+				ResolveRole("Member")
 			}));
 		}
 
-		public RbacPermission GetPermission(string permissionName)
+		public async Task LoadUserData(StreamReader userDataStream)
+		{
+			LoadUserData(await userDataStream.ReadToEndAsync());
+		}
+		public void LoadUserData(string userData)
+		{
+			Users = JsonConvert.DeserializeObject<List<User>>(userData, new UserCreationConverter(this));
+		}
+
+		public RbacPermission ResolvePermission(string permissionName)
 		{
 			return Permissions.Find((RbacPermission permission) => permission.Name == permissionName);
 		}
-		public RbacRole GetRole(string roleName)
+		public RbacRole ResolveRole(string roleName)
 		{
 			return Roles.Find((RbacRole role) => role.Name == roleName);
 		}
+		public IEnumerable<RbacRole> ResolveRoles(IEnumerable<string> roleNames)
+		{
+			foreach (RbacRole role in Roles)
+			{
+				if(roleNames.Contains(role.Name))
+					yield return role;
+			}
+		}
 	}
 }