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    Question

    In asymmetric encryption, which of the following

    statements is correct?
    A The same key is used for both encryption and decryption Correct Answer Incorrect Answer
    B A public key encrypts data, and only a private key can decrypt it Correct Answer Incorrect Answer
    C A symmetric key is shared between both the sender and receiver Correct Answer Incorrect Answer
    D A private key is used to encrypt data, and the public key decrypts it Correct Answer Incorrect Answer
    E The encryption algorithm is faster than symmetric encryption Correct Answer Incorrect Answer

    Solution

    Asymmetric encryption uses a pair of keys: a public key and a private key. The public key is openly distributed and used for encrypting data, while the private key, which is kept confidential by the owner, is used for decryption. This system ensures secure communication because even if the public key is intercepted, only the intended recipient can decrypt the data with their private key. This encryption method is widely used in securing emails, digital signatures, and SSL/TLS protocols for web security. It provides confidentiality and authentication, as only the private key owner can read or sign the encrypted data. For instance, RSA is a commonly used asymmetric encryption algorithm. Why Other Options Are Incorrect :

    1. The same key is used for both encryption and decryption : This describes symmetric encryption, not asymmetric encryption.
    2. A symmetric key is shared between both the sender and receiver : Symmetric encryption requires a shared secret key, which is not how asymmetric encryption operates.
    3. A private key is used to encrypt data, and the public key decrypts it : The reverse is true in most asymmetric systems, particularly for confidentiality.
    4. The encryption algorithm is faster than symmetric encryption : Asymmetric encryption is generally slower due to its computational complexity.

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