18 Questions
What is the common feature of encryption processes according to the text?
The algorithm can be public, but the key will always be private.
In the context of digital encryption, what does hashing refer to?
A one-way transformation that is not invertible.
What is the fundamental role of keys in modern encryption according to the text?
Keys are used for encryption and decryption processes.
Which best describes the relationship between cryptography and decryption?
Decryption involves decoding encrypted data using a decryption key.
Why is it difficult for hackers to break into encrypted data according to the text?
Because decryption keys are kept secret.
Which statement accurately describes the concept of public key cryptography?
Public keys are shared openly, while private keys are kept secret.
What was the reason behind the German decision to change the Enigma cipher system daily?
To make the code harder to crack by increasing its security.
What feature of digital signatures ensures that the sender cannot retract or deny the message sent?
Non-repudiation
How does encryption differ from digital signatures in terms of key usage?
Encryption uses the receiver's public key, while digital signatures use the sender's private key.
What role did Turing play in overcoming the German tactic of changing Enigma cipher codes daily?
He invented a machine that could calculate the millions of daily permutations needed to decrypt the codes.
What is the main purpose of using digital signatures in secure communications?
To authenticate the identity of the sender.
Why did the Germans increase security by changing Enigma cipher codes daily?
To make decryption more difficult and enhance security measures.
What is the purpose of using public key cryptography in secure communications?
Both a and b
In the context of secure communications, what does Alice do to ensure that only Bob can read her message?
Encrypts the message with Bob's public key
What is the primary function of encryption in secure communications?
To prevent unauthorized access to data
Which cryptographic key is used for encrypting a message in public key cryptography?
Public key of the recipient
How does public key cryptography help in verifying the identity of the sender in secure communications?
By digitally signing the message with the sender's private key
What distinguishes message encryption from signatures in public key cryptography?
Signatures are used for verifying the sender's identity, while encryption protects data confidentiality
Learn about Alan Turing's invention of the machine that was able to crack the German Enigma code during World War II. Discover how this breakthrough changed the course of the war.
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