Cyberstart Intern Base Level 3

Multiple Choice

According to the video, hexadecimals is a way of representing values that uses a base of _____ instead of base ten.

• base 2

• base 5

• base 10

• base 16

Multiple Choice

The first place to try to break the code is ...

• hex to to binary decoder

• hex to text decoder

• hex to ascii decoder

• hex to decimal decoder

Multiple Choice

The second hint was the name ROXy.

If you are getting into cryptography, or just trying to understand the fundamentals, you may have noticed that the exclusive or (XOR) operation is used quite often, especially in ciphers. XOR, or “exclusive or” operates on binary data. It returns true if both of its inputs are opposites (one false and one true), otherwise, it returns false. To decrypt this the person in the video went to

• XOR Cipher

• CrypTool Portal

• XOR Encryption Cracker

• XOR Calculator Online

Drag and Drop

Explore behind the curtain

When you interact with a web app, all kinds of ​

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are occurring in the background. There is a lot of ​

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and complexity behind the wonderful, simple and powerful exchanges you have with ​

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online.

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transactions

code

websites

emails

photos

videos

music

Dropdown

There are lots of popular browsers out there, but each of them has ​

Select answer

which allow you to gain insights and perform ​

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. These tools can be accessed a number of ways such as via the browser dropdown menu, right-clicking on the page and choosing Inspect, or using shortcuts such as ​

Select answer

or F12.

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A browsers suite of dev tools includes the ​

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where you can view errors, messages and run commands, the ​

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where you can review and modify page elements and the ​

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which allows you to analyze code and replay attacks.

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Console

Inspector

Debugger

Dropdown

We can use the browser Developer Tools to explore the code behind a ​

Select answer

, find information hidden from sight, change data to ​

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if something interesting happens, or find other resources to access. All very useful whether we are testing an application to find a way in, or understanding how a​

Select answer

distributed some malicious code!

Multiple Choice

What is the goal of the challenge?

• Solve a math problem in less than 0.1 seconds

• Inspect the HTML code

• Change the CSS code

• Submit the answer quickly

Multiple Choice

What did the class change to when the code was run?

• Spinning

• Ready

• Locked

• None of the above

Multiple Choice

What did the action seem to have disappeared to?

• Spinning

• Ready

• Locked

• None of the above

Multiple Choice

What did the submit button change to after adding the action back?

• Spinning

• Ready

• Locked

• None of the above

Multiple Choice

What did the participant have to do to submit the answer?

• Subtract the second number from the first number

• Multiply the first number by the second number

• Divide the first number by the second number

• Add the first number to the second number

Drag and Drop

If you are not familiar with the ​

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command line yet, you may want to check out the Linux section of the field manual. You can get practice in CyberStart and the CyberStart Virtual Machine too. Command line ​

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are invaluable as you progress in ​

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, and computer science generally!

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Linux

skills

cyber security

Multiple Choice

What was the issue with the mobile application?

• Customers couldn't access the app

• Customers couldn't log in

• Customers couldn't see their current balance

• Customers couldn't make payments

Multiple Choice

What was the correct URL to retrieve account information?

• get_accounts

• get_payments

• get_transactions

• get_balance

Multiple Choice

What command is used to access the data in a website?

• ls

• grep

• curl

• 
  cd