Encryption at rest in Kafka - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable encryption at rest by specifying the correct configuration property.

Kafka

props.put("[1]", "true");

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

Aencryption.at.rest

Bencryption.enabled

Cencryption.at.rest.enable

Dencryption.at.rest.enabled

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect property names that do not exist in Kafka configuration.

Confusing encryption at rest with encryption in transit properties.

The correct Kafka configuration property to enable encryption at rest is encryption.at.rest.enabled.

2fill in blank

medium

Complete the code to specify the encryption key location for Kafka's encryption at rest.

Kafka

props.put("encryption.key.location", "[1]");

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

A/etc/kafka/keys/keyfile

Bkafka.key

C/var/lib/kafka/key

Dkeyfile.txt

Attempts:

3 left

💡 Hint

Common Mistakes

Using relative paths or just filenames without full path.

Using incorrect or non-existent paths.

The encryption key location should be a full path to the key file, such as /etc/kafka/keys/keyfile.

3fill in blank

hard

Fix the error in the code to correctly configure Kafka to use AES encryption algorithm for encryption at rest.

Kafka

props.put("encryption.algorithm", "[1]");

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

ARSA

BAES

CSHA256

DDES

Attempts:

3 left

💡 Hint

Common Mistakes

Using hashing algorithms like SHA256 instead of encryption algorithms.

Using asymmetric algorithms like RSA for encryption at rest.

The correct algorithm for encryption at rest in Kafka is AES, which is a symmetric encryption algorithm.

4fill in blank

hard

Fill both blanks to configure Kafka to rotate encryption keys every 30 days and set the key rotation policy.

Kafka

props.put("encryption.key.rotation.interval.days", "[1]");
props.put("encryption.key.rotation.policy", "[2]");

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

A30

B60

Cautomatic

Dmanual

Attempts:

3 left

💡 Hint

Common Mistakes

Setting the interval to 60 days instead of 30.

Using 'manual' instead of 'automatic' for key rotation policy.

Setting the rotation interval to 30 days and the policy to automatic enables Kafka to rotate keys every 30 days automatically.

5fill in blank

hard

Fill all three blanks to create a secure Kafka configuration for encryption at rest with key location, algorithm, and enabling encryption.

Kafka

props.put("encryption.key.location", "[1]");
props.put("encryption.algorithm", "[2]");
props.put("encryption.at.rest.enabled", "[3]");

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

A/etc/kafka/secure/keyfile

BAES

Ctrue

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using relative or insecure paths for the key location.

Choosing incorrect encryption algorithms.

Forgetting to enable encryption by setting the property to 'true'.

This configuration sets the key location to a secure path, uses AES encryption, and enables encryption at rest.

Practice

1. What does encryption at rest mean in the context of Kafka?

easy

A. Encrypting data while it is being sent between Kafka brokers

B. Protecting stored Kafka data by making it unreadable without a key

C. Compressing Kafka messages to save disk space

D. Authenticating users before they access Kafka topics

Solution

1. Step 1: Understand encryption at rest

   Encryption at rest means data stored on disk is encrypted to prevent unauthorized reading.

2. Step 2: Differentiate from other security concepts

   Encryption in transit protects data moving between systems, not stored data.

3. Final Answer:

   Protecting stored Kafka data by making it unreadable without a key -> Option B

4. Quick Check:

   Encryption at rest = Protect stored data [OK]

Hint: Encryption at rest means stored data is unreadable without keys [OK]

Common Mistakes:

• Confusing encryption at rest with encryption in transit
• Thinking compression is encryption
• Mixing authentication with encryption

2. Which of the following is the correct way to enable encryption at rest in Kafka?

easy

A. Use disk-level encryption or external tools since Kafka does not encrypt data on disk by default

B. Add encryption.at.rest=true in the Kafka topic configuration

C. Set ssl.enabled=true in the Kafka broker configuration

D. Configure kafka.security.encryption=true in the producer settings

Solution

1. Step 1: Check Kafka's default encryption behavior

   Kafka does not encrypt data on disk by default; it requires external disk encryption or tools.

2. Step 2: Review configuration options

   Options A, B, and D are not valid Kafka configurations for encryption at rest.

3. Final Answer:

   Use disk-level encryption or external tools since Kafka does not encrypt data on disk by default -> Option A

4. Quick Check:

   Kafka disk encryption = external tools [OK]

Hint: Kafka needs external disk encryption for data at rest [OK]

Common Mistakes:

• Assuming SSL enables encryption at rest
• Trying to set non-existent Kafka config keys
• Confusing topic or producer configs with disk encryption

3. Given the following Kafka broker configuration snippet, what is the effect on data security?

listeners=PLAINTEXT://:9092
ssl.enabled.protocols=TLSv1.2,TLSv1.3
ssl.keystore.location=/var/private/keystore.jks
ssl.keystore.password=changeit

medium

A. Data is encrypted both on disk and during transmission

B. Data is encrypted on disk but not during transmission

C. Data is encrypted during transmission but not on disk

D. No encryption is enabled

Solution

1. Step 1: Analyze the configuration

   The listeners are set to PLAINTEXT://:9092, which means connections are not encrypted (no SSL/TLS in transit). The SSL keystore settings are present but not activated for this listener.

2. Step 2: Confirm no encryption at rest

   There are no settings for disk encryption; data on disk is unencrypted.

3. Final Answer:

   Data is encrypted during transmission but not on disk -> Option C

4. Quick Check:

   PLAINTEXT listener + no disk encryption = no encryption at rest, but SSL settings indicate encryption possible if listener changed [OK]

Hint: PLAINTEXT listener means no encryption in transit or at rest [OK]

Common Mistakes:

• Assuming SSL encrypts data on disk
• Ignoring the PLAINTEXT listener setting
• Confusing keystore with disk encryption

4. You want to enable encryption at rest for Kafka data. You added the following to your broker config:

encryption.at.rest=true

But it does not work. What is the likely problem?

medium

A. You need to restart the Kafka producer, not the broker

B. The config key is case sensitive and should be Encryption.At.Rest

C. You must set ssl.enabled=true instead

D. Kafka does not support encryption.at.rest config; disk encryption must be external

Solution

1. Step 1: Verify Kafka config support

   Kafka does not have a built-in encryption.at.rest configuration option.

2. Step 2: Understand how to enable encryption at rest

   Encryption at rest requires external disk encryption tools or file system encryption.

3. Final Answer:

   Kafka does not support encryption.at.rest config; disk encryption must be external -> Option D

4. Quick Check:

   No native encryption at rest config in Kafka [OK]

Hint: Kafka needs external disk encryption, no native config key [OK]

Common Mistakes:

• Trying to use non-existent Kafka config keys
• Restarting wrong components
• Confusing SSL with encryption at rest

5. You want to ensure Kafka data is encrypted at rest on a Linux server. Which approach correctly applies encryption at rest while keeping Kafka running smoothly?

hard

A. Use Linux LUKS disk encryption on the Kafka data directory and configure Kafka normally

B. Enable SSL in Kafka broker config to encrypt data on disk

C. Set Kafka topic config encryption.enabled=true to encrypt data at rest

D. Use Kafka producer encryption settings to encrypt data before writing to disk

Solution

1. Step 1: Identify how to encrypt data at rest on Linux

   Linux LUKS provides full disk encryption, protecting Kafka data on disk transparently.

2. Step 2: Confirm Kafka compatibility

   Kafka works normally on encrypted disks without special config; SSL and topic configs do not encrypt at rest.

3. Final Answer:

   Use Linux LUKS disk encryption on the Kafka data directory and configure Kafka normally -> Option A

4. Quick Check:

   Disk encryption tool + normal Kafka = encryption at rest [OK]

Hint: Use OS-level disk encryption for Kafka data at rest [OK]

Common Mistakes:

• Thinking SSL encrypts data on disk
• Expecting Kafka topic configs to encrypt data at rest
• Trying to encrypt data only at producer level