diff --git a/package.json b/package.json
index c193f44..0d9c1be 100644
--- a/package.json
+++ b/package.json
@@ -8,6 +8,7 @@
     "test": "bun test"
   },
   "dependencies": {
+    "argon2": "^0.40.1",
     "jose": "^5.2.3",
     "log": "^6.3.1",
     "result": "git+git@git.pband.ch:typescript/result.git",
@@ -15,6 +16,7 @@
   },
   "devDependencies": {
     "@happy-dom/global-registrator": "^14.10.2",
+    "@types/argon2": "^0.15.0",
     "@types/bun": "^1.1.2",
     "@types/zxcvbn": "^4.4.4"
   },
diff --git a/src/pwd.ts b/src/pwd.ts
index 4e0d313..3566cc2 100644
--- a/src/pwd.ts
+++ b/src/pwd.ts
@@ -1,6 +1,13 @@
-export function hash(pwd: string) : string {
-    throw "todo"
+import argon from 'argon2'
+
+export function hash(pwd: string): Promise<string> {
+    return argon.hash(pwd)
 }
-export function verify(pwd: string, hash: string) : boolean {
-    throw "todo"
+
+export async function verify(pwd: string, hash: string): Promise<boolean> {
+    try {
+        return await argon.verify(hash, pwd)
+    } catch (_) {}
+
+    return false
 }
diff --git a/test/pwd.test.ts b/test/pwd.test.ts
new file mode 100644
index 0000000..3e58eb1
--- /dev/null
+++ b/test/pwd.test.ts
@@ -0,0 +1,35 @@
+import {test, expect} from 'bun:test'
+
+import {pwd} from '../index'
+
+test('base case', async () => {
+    const password = "AwesomePassword123!"
+    const hash = await pwd.hash(password)
+    const verification = await pwd.verify(password, hash)
+    expect(verification).toBe(true)
+})
+
+test('wrong password', async () => {
+    const password1 = "AwesomePassword123!"
+    const password2 = "AwesomePassword321!"
+    expect(password1).not.toEqual(password2)
+
+    const hash = await pwd.hash(password1)
+    const verification = await pwd.verify(password2, hash)
+    expect(verification).toBe(false)
+})
+
+test('salt changes', async () => {
+    const password = "AwesomePassword123!"
+    const hash1 = await pwd.hash(password)
+    const hash2 = await pwd.hash(password)
+    expect(hash1).not.toEqual(hash2)
+})
+
+test('tampered hash', async () => {
+    const password = "AwesomePassword123"
+    const hash = await pwd.hash(password)
+    const tamperedHash = hash.replace('a', 'b')
+    const verification = await pwd.verify(password, tamperedHash)
+    expect(verification).toBe(false)
+})