File Encryption Quiz

Adolfo and Andrew are discussing about symmetric encryption. Adolfo says, 'Symmetric encryption is a type of encryption that doesn't require a key for decryption.' Andrew disagrees and says, 'No, it's a type of encryption that only works for text files.' Steven, who was listening to their conversation, interjects and says, 'You both are wrong. Symmetric encryption is a type of encryption where different keys are used for encryption and decryption.' Isaac, who was also there, says, 'No, symmetric encryption is a type of encryption where the same key is used for both encryption and decryption.' Who is correct?

• Adolfo

• Andrew

• Steven

• Isaac

Adolfo and Isaac are discussing about symmetric encryption. Adolfo says that in symmetric encryption, a different key is used for encryption and decryption. Isaac disagrees and says that in symmetric encryption, the same key is used for both encryption and decryption. For example, when they use the Advanced Encryption Standard (AES) algorithm to secure their emails, a single secret key is used for both encryption and decryption of data. Who is correct?

• Adolfo is correct, in symmetric encryption, a different key is used for encryption and decryption

• Steven, who is not part of the conversation, is correct. The Advanced Encryption Standard (AES) algorithm uses a different key for encryption and decryption

• Isaac is correct, in symmetric encryption, the same key is used for both encryption and decryption. For example, the Advanced Encryption Standard (AES) algorithm uses a single secret key for both encryption and decryption of data.

• Rodrigo, who is not part of the conversation, is correct. Symmetric encryption does not involve any key

Adolfo and Andrew are discussing the use of symmetric encryption in their new software project. Adolfo believes it's fast and efficient, but Andrew is concerned about the challenges of securely sharing the key. What are the advantages and disadvantages of symmetric encryption in this context?

• Fast and efficient, and easy for Adolfo and Andrew to securely share the key

• Slow and inefficient, but easy for Adolfo and Andrew to securely share the key

• Both fast and efficient, but challenging for Adolfo and Andrew to securely share the key

• Both slow and inefficient, and challenging for Adolfo and Andrew to securely share the key

Steven wants to send a confidential document to Andrew over the internet. He decides to use asymmetric encryption. What does this mean?

• Steven is using a type of encryption that is only used for securing emails

• Steven is using a type of encryption where only one key is used for both encryption and decryption

• Steven is using a type of encryption where a pair of keys is used to encrypt and decrypt data

• Steven is using a type of encryption that uses a special algorithm to encode and decode data

Adolfo and Steven are discussing about encryption methods. Adolfo says that asymmetric encryption differs from symmetric encryption because:

• Asymmetric encryption uses a pair of public and private keys

• Asymmetric encryption is only used for securing emails

• Asymmetric encryption is faster than symmetric encryption

• Asymmetric encryption uses the same key for both encryption and decryption

Isaac and Rodrigo are trying to securely exchange messages using asymmetric encryption. Explain the roles of public and private keys in their communication.

• Isaac and Rodrigo use the same public key for both encrypting and decrypting their messages.

• Isaac uses Rodrigo's public key for encryption, and Rodrigo uses his private key for decryption.

• Isaac uses Rodrigo's public key for decryption, and Rodrigo uses his private key for encryption.

• Both Isaac and Rodrigo use both the public and private keys for encrypting their messages.

Steven is sending a file to Rodrigo over the internet. He wants to ensure that the file has not been tampered with and that Rodrigo can verify it was indeed sent by him. How can Steven achieve this?

• He can use a special type of font in the file, but this has nothing to do with file encryption or verification.

• Steven can create a duplicate copy of the file for backup purposes, but this doesn't help with verification or encryption.

• He can use a form of electronic payment for online transactions, but this has no connection to file encryption or verification.

• Steven can use a digital signature, a cryptographic technique used to verify the authenticity and integrity of a digital message or document. This will ensure the file has not been tampered with and Rodrigo can verify the identity of the sender.

Rodrigo wants to send a confidential document to Isaac over the internet. He decides to use a digital signature to ensure the document's authenticity. Can you explain the process Rodrigo should follow to create and verify this digital signature?

• Rodrigo should use Isaac's public key to encrypt the document and his own private key to decrypt and verify the signature.

• Rodrigo should use a password to encrypt the document and Isaac's fingerprint to verify the signature.

• Rodrigo should use his private key to encrypt the document and Isaac's public key to decrypt and verify the signature.

• Rodrigo should scan his physical signature, convert it into a digital format, and attach it to the document.

Andrew is sending a confidential document to Isaac over the internet. He decides to use digital signatures in file encryption. What are the benefits of Andrew's approach?

• It slows down the file encryption process

• It provides authentication, integrity, and non-repudiation.

• It increases the risk of data breaches

• It requires additional hardware for implementation

Rodrigo is sending a confidential document to Isaac over the internet and wants to encrypt it. He is considering using AES encryption. Can you help him understand what AES encryption is and how it works?

• AES encryption is a form of encryption that uses a stream cipher to encode data

• AES encryption is a type of public key encryption used for securing emails

• AES encryption is a symmetric key encryption algorithm that uses a block cipher to encrypt and decrypt data.

• AES encryption is a hashing algorithm used for compressing files