Question
In the context of asymmetric encryption, which of the
following is a key feature of public-private key pairs?Solution
Asymmetric encryption uses a pair of keys: a public key, shared openly, and a private key, kept confidential. In this system:
- Data encrypted using the private key can be decrypted by the corresponding public key , which is essential for digital signatures. For instance, signing a document with a private key allows recipients to verify its authenticity using the public key.
- Conversely, data encrypted with the public key can only be decrypted with the private key , ensuring secure transmission of sensitive information.
- Option A: While the keys are mathematically related, they are not interchangeable for encryption and decryption.
- Option B: The private key is not solely for encryption; it is often used for decryption or signing.
- Option D: The private key must remain confidential and is never shared between parties.
- Option E: Public-private key pairs are not directly used for hashing, which is a different cryptographic operation.
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