diff --git a/semana19/criptografia/package.json b/semana19/criptografia/package.json
new file mode 100644
index 0000000..97975c9
--- /dev/null
+++ b/semana19/criptografia/package.json
@@ -0,0 +1,28 @@
+{
+  "name": "aula-back-arquitetura",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "ts-node-dev ./src/index.ts",
+    "build": "tsc"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@types/express": "4.17.0",
+    "@types/jsonwebtoken": "^8.3.9",
+    "@types/knex": "^0.16.1",
+    "@types/node": "^13.7.7",
+    "@types/uuid": "^7.0.3",
+    "dotenv": "^8.2.0",
+    "express": "4.17.0",
+    "jsonwebtoken": "^8.5.1",
+    "knex": "^0.21.1",
+    "mysql": "^2.18.1",
+    "ts-node": "^8.6.2",
+    "ts-node-dev": "^1.0.0-pre.44",
+    "typescript": "^3.8.3",
+    "uuid": "^8.0.0"
+  }
+}
diff --git a/semana19/criptografia/src/index.ts b/semana19/criptografia/src/index.ts
new file mode 100644
index 0000000..65d6d66
--- /dev/null
+++ b/semana19/criptografia/src/index.ts
@@ -0,0 +1,18 @@
+import express, { Request, Response } from "express";
+import dotenv from "dotenv";
+import { AddressInfo } from "net";
+
+dotenv.config();
+
+const app = express();
+
+app.use(express.json());
+
+const server = app.listen(process.env.PORT || 3003, () => {
+  if (server) {
+    const address = server.address() as AddressInfo;
+    console.log(`Server is running in http://localhost:${address.port}`);
+  } else {
+    console.error(`Failure upon starting server.`);
+  }
+});
diff --git a/semana19/criptografia/tsconfig.json b/semana19/criptografia/tsconfig.json
new file mode 100644
index 0000000..b520b3a
--- /dev/null
+++ b/semana19/criptografia/tsconfig.json
@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "target": "es6" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */,
+    "module": "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
+    "outDir": "./build" /* Redirect output structure to the directory. */,
+    "rootDir": "./" /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */,
+    "strict": true /* Enable all strict type-checking options. */,
+    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
+    "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */
+  }
+}