What will this code print?

Question

BlackTom AI · Accepted Answer

To start, consider what the given code is doing step by step with the cryptography library. 
Option 1: hello — This is the expected outcome because the code encrypts the byte string b"hello" with a Fernet object and then immediately decrypts the resulting token, yielding the original plaintext when decoded to a string.
Option 2: b’hello’ — This would be the raw bytes representation, but the print statement decodes the decrypted token to a string, so the actual output is a regular string, not a byte representation.
Option 3: None — There is a valid decryption path for the token produced by Fernet, so the result is not None; the code returns the original message after decoding.
Option 4: Key — The key variable is used to create the Fernet instance and to encrypt/decrypt, but the print statement outputs the decrypted plaintext, not the key itself.
Option 5: Encrypted string — The token is the encrypted bytes, but the print statement prints the decrypted plaintext after decoding, so the output is not the raw encrypted form.
In summary, the flow encrypts a literal message and then decrypts it to recover the same message, which is printed as a string.

IS 4485-001 Fall 2025 Final Exam Practice 2

What will this code print?

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印第安纳·琼斯与命运之盘你是印第安纳·琼斯的船员之一，在旅途中遇到了打开锁的密码：113545134421{350315481455_13135231542}作为天才密码破译者，你成功破解了密码。密码是什么？旗帜格式：apuCTF{flag}

I've encrypted the flag with my secret key, you'll never be able to guess it.02020c33202918431f2f0d5f162d321e44183c0b49052b240d420e0dHint: Remember this is a crypto challenge and how it might help you in this challenge!Flag format: apuCTF{flag}

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IS 4485-001 Fall 2025 Final Exam Practice 2

What will this code print?

查看解析

登录即可查看完整答案

类似问题

位置14的问题 Cryptography in blockchain is primarily used for maintaining confidentiality and for transaction verification.TrueFalse

位置13的问题 What is Cryptography?Cryptography is public communication.Cryptography is communication in an adversarial environment.Cryptography is a communication method with a short history.Cryptography is only used by the military.

位置12的问题 Cryptography in blockchain ensures both the security of transaction data and the authenticity of the users involved.TrueFalse

位置10的问题 Which of the following is NOT a type of cryptography relevant to blockchain?Asymmetric key cryptographyPhishing AttacksSymmetric key cryptographyDigital signatures

位置9的问题 Which of the following is NOT a key property of cryptographic communication?SpeedIntegrityAuthenticationConfidentiality

印第安纳·琼斯与命运之盘 你是印第安纳·琼斯的船员之一，在旅途中遇到了打开锁的密码：113545134421{350315481455_13135231542}作为天才密码破译者，你成功破解了密码。密码是什么？旗帜格式：apuCTF{flag}

I've encrypted the flag with my secret key, you'll never be able to guess it.02020c33202918431f2f0d5f162d321e44183c0b49052b240d420e0dHint: Remember this is a crypto challenge and how it might help you in this challenge!Flag format: apuCTF{flag}

更多留学生实用工具

希望你的学习变得更简单

印第安纳·琼斯与命运之盘你是印第安纳·琼斯的船员之一，在旅途中遇到了打开锁的密码：113545134421{350315481455_13135231542}作为天才密码破译者，你成功破解了密码。密码是什么？旗帜格式：apuCTF{flag}