diff --git a/Backend/package-lock.json b/Backend/package-lock.json
index 7e9b2ec..189bf28 100644
--- a/Backend/package-lock.json
+++ b/Backend/package-lock.json
@@ -8,14 +8,17 @@
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       "license": "ISC",
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@@ -29,6 +32,39 @@
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@@ -504,6 +583,20 @@
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+      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.5.tgz",
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@@ -630,6 +723,19 @@
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+      "dependencies": {
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@@ -767,6 +873,14 @@
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@@ -1207,6 +1333,11 @@
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+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
+      "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
+      "requires": {
+        "string-width": "^1.0.2 || 2"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
+          "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg="
+        },
+        "string-width": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
+          "integrity": "sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==",
+          "requires": {
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^4.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+          "requires": {
+            "ansi-regex": "^3.0.0"
+          }
+        }
+      }
+    },
     "wrap-ansi": {
       "version": "5.1.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-5.1.0.tgz",
@@ -7574,9 +8309,14 @@
       "integrity": "sha512-fDlsI/kFEx7gLvbecc0/ohLG50fugQp8ryHzMTuW9vSa1GJ0XYWKnhsUx7oie3G98+r56aTQIUB4kht42R3JvA=="
     },
     "y18n": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.3.tgz",
+      "integrity": "sha512-JKhqTOwSrqNA1NY5lSztJ1GrBiUodLMmIZuLiDaMRJ+itFd+ABVE8XBjOvIWL+rSqNDC74LCSFmlb/U4UZ4hJQ=="
+    },
+    "yallist": {
       "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
-      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w=="
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
     },
     "yargonaut": {
       "version": "1.1.4",
diff --git a/Backend/package.json b/Backend/package.json
index ec4185e..362c0aa 100644
--- a/Backend/package.json
+++ b/Backend/package.json
@@ -11,14 +11,17 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "bcrypt": "^5.0.1",
     "cors": "^2.8.5",
     "dotenv": "^8.2.0",
     "express": "^4.17.1",
+    "guid-typescript": "^1.0.9",
     "helmet": "^4.2.0",
     "mariadb": "^2.5.1",
     "typeorm": "^0.2.29"
   },
   "devDependencies": {
+    "@types/bcrypt": "^3.0.1",
     "@types/cors": "^2.8.8",
     "@types/dotenv": "^8.2.0",
     "@types/express": "^4.17.9",
diff --git a/Backend/src/index.ts b/Backend/src/index.ts
index 81a00ce..3f7bed5 100644
--- a/Backend/src/index.ts
+++ b/Backend/src/index.ts
@@ -13,6 +13,7 @@ import {pricesRouter} from './models/prices/prices.router';
 import {vendorsRouter} from './models/vendors/vendors.router';
 import {errorHandler} from './middleware/error.middleware';
 import {notFoundHandler} from './middleware/notFound.middleware';
+import {usersRouter} from './models/users/users.router';
 
 dotenv.config();
 
@@ -41,6 +42,7 @@ app.use('/products', productsRouter);
 app.use('/categories', categoriesRouter);
 app.use('/manufacturers', manufacturersRouter);
 app.use('/prices', pricesRouter);
+app.use('/users', usersRouter);
 app.use('/vendors', vendorsRouter);
 
 app.use(errorHandler);
diff --git a/Backend/src/models/users/session.interface.ts b/Backend/src/models/users/session.interface.ts
new file mode 100644
index 0000000..4b68e9e
--- /dev/null
+++ b/Backend/src/models/users/session.interface.ts
@@ -0,0 +1,10 @@
+export interface Session {
+    session_id: number;
+    session_key: string;
+    session_key_hash: string;
+    createdDate?: Date;
+    lastLogin?: Date;
+    validUntil?: Date;
+    validDays?: number;
+    last_IP: string;
+}
diff --git a/Backend/src/models/users/user.interface.ts b/Backend/src/models/users/user.interface.ts
new file mode 100644
index 0000000..b4e433c
--- /dev/null
+++ b/Backend/src/models/users/user.interface.ts
@@ -0,0 +1,9 @@
+export interface User {
+    user_id: number;
+    username: string;
+    email: string;
+    password_hash: string;
+    hashing_salt: string;
+    registration_date: Date;
+    last_login_date: Date;
+}
diff --git a/Backend/src/models/users/users.interface.ts b/Backend/src/models/users/users.interface.ts
new file mode 100644
index 0000000..9a81dcf
--- /dev/null
+++ b/Backend/src/models/users/users.interface.ts
@@ -0,0 +1,5 @@
+import {User} from './user.interface';
+
+export interface Users {
+    [key: number]: User;
+}
diff --git a/Backend/src/models/users/users.router.ts b/Backend/src/models/users/users.router.ts
new file mode 100644
index 0000000..f80bbc4
--- /dev/null
+++ b/Backend/src/models/users/users.router.ts
@@ -0,0 +1,55 @@
+/**
+ * Required External Modules and Interfaces
+ */
+
+import express, {Request, Response} from 'express';
+import * as UserService from './users.service';
+import {User} from './user.interface';
+import {Users} from './users.interface';
+import {Session} from './session.interface';
+
+
+/**
+ * Router Definition
+ */
+
+export const usersRouter = express.Router();
+
+
+/**
+ * Controller Definitions
+ */
+
+// POST users/register
+
+usersRouter.post('/register', async (req: Request, res: Response) => {
+    try {
+        const username: string = req.body.username;
+        const password: string = req.body.password;
+        const email: string = req.body.email;
+        const ip: string = req.connection.remoteAddress?? '';
+
+        if (!username || !password || !email) {
+            // Missing
+            res.status(400).send(JSON.stringify({message: 'Missing parameters'}));
+            return;
+        }
+
+        // Check if username and / or email are already used
+        const status = await UserService.checkUsernameAndEmail(username, email);
+
+        if (status.hasProblems) {
+            // Username and/or email are duplicates, return error
+            res.status(400).send(JSON.stringify({messages: status.messages, codes: status.codes}));
+            return;
+        }
+
+        // Create the user and a session
+        const session: Session = await UserService.createUser(username, password, email, ip);
+
+        // Send the session details back to the user
+        res.status(201).send(session);
+    } catch (e) {
+        res.status(404).send(e.message);
+    }
+});
diff --git a/Backend/src/models/users/users.service.ts b/Backend/src/models/users/users.service.ts
new file mode 100644
index 0000000..e9c7014
--- /dev/null
+++ b/Backend/src/models/users/users.service.ts
@@ -0,0 +1,141 @@
+import * as dotenv from 'dotenv';
+import * as bcrypt from 'bcrypt';
+import {Guid} from 'guid-typescript';
+
+
+dotenv.config();
+
+const mariadb = require('mariadb');
+const pool = mariadb.createPool({
+    host: process.env.DB_HOST,
+    user: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    connectionLimit: 5
+});
+
+/**
+ * Data Model Interfaces
+ */
+
+import {User} from './user.interface';
+import {Users} from './users.interface';
+import {Session} from './session.interface';
+
+
+/**
+ * Service Methods
+ */
+
+/**
+ * Creates a user record in the database, also creates a session. Returns the session if successful.
+ */
+export const createUser = async (username: string, password: string, email: string, ip: string): Promise<Session> => {
+    let conn;
+    try {
+        // Hash password and generate + hash session key
+        const pwHash = bcrypt.hashSync('123', 10);
+        const sessionKey = Guid.create().toString();
+        const sessionKeyHash = bcrypt.hashSync(sessionKey, 10);
+
+        // Create user entry in SQL
+        conn = await pool.getConnection();
+        const userQuery = 'INSERT INTO users (username, email, bcrypt_password_hash) VALUES (?, ?, ?) RETURNING user_id';
+        const userIdRes = await conn.query(userQuery, [username, email, pwHash]);
+        await conn.commit();
+
+        // Get user id of the created user
+        let userId: number = -1;
+        for (const row in userIdRes) {
+            if (row !== 'meta' && userIdRes[row].user_id != null) {
+                userId = userIdRes[row].user_id;
+            }
+        }
+
+        // Create session
+        const sessionQuery = 'INSERT INTO sessions (user_id, session_key_hash, createdDate, lastLogin, validUntil, validDays, last_IP) VALUES (?,?,NOW(),NOW(),DATE_ADD(NOW(), INTERVAL 30 DAY),30,?) RETURNING session_id';
+        const sessionIdRes = await conn.query(sessionQuery, [userId, sessionKeyHash, ip]);
+        await conn.commit();
+
+        // Get session id of the created user
+        let sessionId: number = -1
+        for (const row in sessionIdRes) {
+            if (row !== 'meta' && sessionIdRes[row].session_id != null) {
+                sessionId = sessionIdRes[row].session_id;
+            }
+        }
+
+        return {
+            session_id: sessionId,
+            session_key: sessionKey,
+            session_key_hash: '',
+            last_IP: ip
+        };
+
+    } catch (err) {
+        throw err;
+    } finally {
+        if (conn) {
+            conn.end();
+        }
+    }
+
+    return {} as Session;
+};
+
+/**
+ * Used in the checkUsernameAndEmail method as return value
+ */
+export interface Status {
+    hasProblems: boolean;
+    messages: string[];
+    codes: number[]; // 0 = all good, 1 = wrong username, 2 = wrong email, 3 = server error
+}
+
+/**
+ * Checks if the given username and email are not used yet by another user
+ * @param username The username to check
+ * @param email The email to check
+ */
+export const checkUsernameAndEmail = async (username: string, email: string): Promise<Status> => {
+    let conn;
+    try {
+        // Create user entry in SQL
+        conn = await pool.getConnection();
+        const usernameQuery = 'SELECT username FROM users WHERE username = ?';
+        const emailQuery = 'SELECT email FROM users WHERE email = ?';
+        const usernameRes = await conn.query(usernameQuery, username);
+        const emailRes = await conn.query(emailQuery, email);
+
+        let res: Status = {
+            hasProblems: false,
+            messages: [],
+            codes: []
+        };
+
+        if (usernameRes.length > 0) {
+            // Username is a duplicate
+            res.hasProblems = true;
+            res.messages.push('Duplicate username');
+            res.codes.push(1);
+        }
+
+        if (emailRes.length > 0) {
+            // Email is a duplicate
+            res.hasProblems = true;
+            res.messages.push('Duplicate email');
+            res.codes.push(2);
+        }
+
+        return res;
+
+    } catch (err) {
+        throw err;
+    } finally {
+        if (conn) {
+            conn.end();
+        }
+    }
+
+    return {hasProblems: true, messages: ['Internal server error'], codes: [3]};
+};