Why security protects deployed IoT devices in Raspberry Pi - Challenge Your Understanding

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of a simple IoT device authentication simulation

Consider this Python code simulating a Raspberry Pi IoT device checking a password before allowing access. What is the output when the password is 'secure123'?

Raspberry Pi

def authenticate(password):
    if password == 'secure123':
        return 'Access granted'
    else:
        return 'Access denied'

print(authenticate('secure123'))

A None

B Access denied

C Error: password not defined

D Access granted

💡 Hint

Check the condition comparing the password string.

The function compares the input password to the string 'secure123'. Since they match, it returns 'Access granted'.

🧠 Conceptual

intermediate

Why encrypt data on IoT devices?

Why is encrypting data important for deployed IoT devices?

A To make the device physically stronger

B To make data unreadable to unauthorized users

C To increase the device's processing speed

D To reduce the device's power consumption

💡 Hint

Think about protecting information from hackers.

Encryption changes data into a secret code so only authorized users can read it, protecting privacy and security.

🔧 Debug

advanced

Identify the error in this IoT device firmware update code

This code snippet is meant to check if a firmware update is valid by comparing version numbers. What error will it cause?

Raspberry Pi

current_version = '1.2.3'
new_version = '1.3.0'

if new_version > current_version:
    print('Update available')
else:
    print('No update')

A SyntaxError due to missing colon after else

B TypeError because versions are strings

C No output because condition is false

D RuntimeError due to invalid comparison

💡 Hint

Check the syntax of the if-else statement.

The else statement is missing a colon (:), causing a SyntaxError.

🚀 Application

advanced

Result of running this Raspberry Pi sensor data encryption code

What will be the output of this code that encrypts sensor data using a simple Caesar cipher with shift 3?

Raspberry Pi

def caesar_encrypt(text, shift):
    result = ''
    for char in text:
        if char.isalpha():
            base = ord('a') if char.islower() else ord('A')
            result += chr((ord(char) - base + shift) % 26 + base)
        else:
            result += char
    return result

sensor_data = 'Temp: 25C'
encrypted = caesar_encrypt(sensor_data, 3)
print(encrypted)

A Whps: 28F

B Temp: 25C

C Whps: 25F

D Error: unsupported operand type

💡 Hint

Look at how letters shift by 3 positions, numbers stay the same.

Each letter shifts 3 places forward: T->W, e->h, m->p, p->s. Numbers and symbols remain unchanged.

❓ Predict Output

expert

Output of this Raspberry Pi IoT device network security check

What is the output of this code that checks if a device IP is in the allowed list?

Raspberry Pi

allowed_ips = {'192.168.1.10', '192.168.1.11', '192.168.1.12'}
device_ip = '192.168.1.13'

if device_ip in allowed_ips:
    print('Device allowed')
else:
    print('Device blocked')

A Device blocked

B Device allowed

C KeyError

D SyntaxError

💡 Hint

Check if the device IP is in the set of allowed IPs.

The device IP '192.168.1.13' is not in the allowed_ips set, so it prints 'Device blocked'.