12 Questions
What is the primary purpose of the public key in a secure communication system?
To encrypt confidential messages
What happens to the private key when a system changes its private key?
It is kept secret and the new public key is published
What is the main advantage of using public and private keys in a secure communication system?
It ensures that only the intended recipient can decrypt the message
What is the role of the public register or accessible file in the system?
To store the public keys of all users
What is the consequence of a user's private key being compromised?
Incoming communication is no longer secure
What is the purpose of Alice maintaining a collection of public keys obtained from others?
To facilitate communication with other users
What is a necessary condition for a public-key encryption scheme to be secure?
It is computationally infeasible for an adversary to determine the private key
What is a trap-door one-way function?
A family of invertible functions that are easy to compute but hard to invert
Why are key sizes limited in public-key cryptography?
To ensure fast encryption and decryption
What is a probable-message attack?
An attack that involves appending random bits to messages
What is the primary use of public-key cryptography today?
Key management and signature applications
What is the purpose of a one-way function in public-key cryptography?
To ensure the security of the system
Learn how public key cryptography works, including key generation, public key registration, and secure message encryption. Understand the roles of public and private keys in confidential communication.
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