Token-based authentication (JWT) in IOT Protocols - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to decode a JWT token using a secret key.

IOT Protocols

decoded = jwt.decode(token, [1], algorithms=["HS256"])

Drag options to blanks, or click blank then click option'

Apublic_key

Bauth_key

Ctoken_key

Dsecret_key

Attempts:

3 left

💡 Hint

Common Mistakes

Using a public key instead of the secret key.

Using the token itself as the key.

The secret key is used to decode the JWT token to verify its authenticity.

2fill in blank

medium

Complete the code to create a JWT token with a payload and secret.

IOT Protocols

token = jwt.encode({"user_id": 123}, [1], algorithm="HS256")

Drag options to blanks, or click blank then click option'

Apublic_key

Bjwt_token

Csecret_key

Dauth_token

Attempts:

3 left

💡 Hint

Common Mistakes

Using a public key or token variable instead of the secret key.

The secret key is required to encode the payload into a JWT token securely.

3fill in blank

hard

Fix the error in the code to verify the JWT token expiration.

IOT Protocols

payload = jwt.decode(token, secret, algorithms=["HS256"], options=[1])

Drag options to blanks, or click blank then click option'

A{"verify_exp": True}

B{"verify_exp": False}

C{"check_exp": True}

D{"validate_exp": False}

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect option keys or disabling expiration verification.

Setting 'verify_exp' to True ensures the token expiration is checked during decoding.

4fill in blank

hard

Fill both blanks to create a JWT token with an expiration time of 1 hour.

IOT Protocols

payload = {"user": "iot_device", "exp": datetime.datetime.utcnow() [1] datetime.timedelta([2]=1)}
token = jwt.encode(payload, secret, algorithm="HS256")

Drag options to blanks, or click blank then click option'

A+

B-

Chours

Dminutes

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-' instead of '+', or using 'minutes' instead of 'hours'.

The expiration time is set by adding 1 hour to the current UTC time.

5fill in blank

hard

Fill all three blanks to extract the user ID from a decoded JWT payload safely.

IOT Protocols

user_id = payload.get([1], [2]) if payload and payload.get([3]) else None

Drag options to blanks, or click blank then click option'

A"user_id"

BNone

D"id"

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong keys or not providing a default value.

This code safely gets the 'user_id' from the payload or returns None if not present.