Podcast
Questions and Answers
Which of the following is a precise definition of computational security?
Which of the following is a precise definition of computational security?
- The attacker has unlimited computational power.
- Guessing the plaintext has the same chances of success after having seen the ciphertext as it had before seeing it.
- The ciphertext leaks no information about the plaintext except the length.
- There is no efficient algorithm that can be used by the attacker to succeed with reasonably high probability. (correct)
What is the difference between computational security and unconditional security?
What is the difference between computational security and unconditional security?
- Computational security requires an efficient algorithm to break the cipher, while unconditional security allows for partial information about the plaintext.
- Computational security requires the attacker to have limited computational power, while unconditional security allows for unlimited computational power.
- Computational security is based on the length of the key, while unconditional security is based on the length of the plaintext.
- Computational security depends on the currently available algorithms and computing power, while unconditional security is impossible to break even with unlimited time and resources. (correct)
What is perfect secrecy in cryptography?
What is perfect secrecy in cryptography?
- Guessing the plaintext has the same chances of success after having seen the ciphertext as it had before seeing it. (correct)
- The attacker has unlimited computational power.
- Ciphertext leaks no information about the plaintext except the length.
- It is unfeasible to break the cipher.
What is the main difference between computational security and perfect secrecy?
What is the main difference between computational security and perfect secrecy?
What is the definition of unconditional security?
What is the definition of unconditional security?
Which type of attack assumes that the attacker has unlimited computational power?
Which type of attack assumes that the attacker has unlimited computational power?
What is the difference between provable security and computational security?
What is the difference between provable security and computational security?
Which type of cryptography has provable security?
Which type of cryptography has provable security?
What is the definition of computational security in terms of the probability of success for the attacker?
What is the definition of computational security in terms of the probability of success for the attacker?
What is the one-time pad?
What is the one-time pad?
What is the difference between computational security and provable security?
What is the difference between computational security and provable security?
Which type of cryptography has no provable security?
Which type of cryptography has no provable security?
Which of the following is a precise definition of computational security?
Which of the following is a precise definition of computational security?
What is the difference between computational security and unconditional security?
What is the difference between computational security and unconditional security?
What is perfect secrecy in cryptography?
What is perfect secrecy in cryptography?
What is the main difference between computational security and perfect secrecy?
What is the main difference between computational security and perfect secrecy?
What is the definition of unconditional security?
What is the definition of unconditional security?
Which type of attack assumes that the attacker has unlimited computational power?
Which type of attack assumes that the attacker has unlimited computational power?
What is the difference between provable security and computational security?
What is the difference between provable security and computational security?
Which type of cryptography has provable security?
Which type of cryptography has provable security?
What is the definition of computational security in terms of the probability of success for the attacker?
What is the definition of computational security in terms of the probability of success for the attacker?
What is the one-time pad?
What is the one-time pad?
What is the difference between computational security and provable security?
What is the difference between computational security and provable security?
Which type of cryptography has no provable security?
Which type of cryptography has no provable security?
Which type of attack does a ciphertext-only attack refer to?
Which type of attack does a ciphertext-only attack refer to?
What does it mean for a cipher to have perfect secrecy?
What does it mean for a cipher to have perfect secrecy?
What type of security is dependent on the currently available algorithms and computing power?
What type of security is dependent on the currently available algorithms and computing power?
What is the difference between computational security and unconditional security?
What is the difference between computational security and unconditional security?
What is the main difference between provable security and computational security?
What is the main difference between provable security and computational security?
What does it mean for a cipher to have unconditional security?
What does it mean for a cipher to have unconditional security?
What is the difference between computational security and provable security?
What is the difference between computational security and provable security?
What is one possible precise mathematical definition of computational security?
What is one possible precise mathematical definition of computational security?
What is one example of a cipher that has perfect secrecy?
What is one example of a cipher that has perfect secrecy?
For which type of cryptography does provable security exist?
For which type of cryptography does provable security exist?
What is the difference between computational security and perfect secrecy?
What is the difference between computational security and perfect secrecy?
What is the difference between provable security and unconditional security?
What is the difference between provable security and unconditional security?
What are the different levels of knowledge the attacker can have in terms of breaking a cipher?
What are the different levels of knowledge the attacker can have in terms of breaking a cipher?
What does it mean to 'break' a cryptosystem?
What does it mean to 'break' a cryptosystem?
Does obtaining partial information about the plaintext/key count as 'breaking' a cryptosystem?
Does obtaining partial information about the plaintext/key count as 'breaking' a cryptosystem?
What is computational security?
What is computational security?
What is unconditional security?
What is unconditional security?
What is the difference between computational security and unconditional security?
What is the difference between computational security and unconditional security?
What is provable security?
What is provable security?
What is the definition of perfect secrecy/information-theoretic security?
What is the definition of perfect secrecy/information-theoretic security?
What is the one-time pad?
What is the one-time pad?
Which type of cryptography has provable security?
Which type of cryptography has provable security?
Which type of cryptography has no provable security?
Which type of cryptography has no provable security?
What is the status of computational security for most ciphers in use today?
What is the status of computational security for most ciphers in use today?
