After a recent internal breach, a company decided to regenerate and reissue all certificates used in the transmission of confidential information.
The company places the greatest importance on confidentiality and non-repudiation, and decided to generate dual key pairs for each client.
Which of the following BEST describes how the company will use these certificates?
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A. B. C. D.A.
The company has decided to regenerate and reissue all certificates used in the transmission of confidential information after a recent internal breach. To ensure confidentiality and non-repudiation, the company has decided to generate dual key pairs for each client.
Dual key pairs are typically used in public key cryptography, where one key is used for encryption and the other for decryption. The process involves creating a public key and a private key, with the public key being distributed to others, while the private key is kept secret.
Based on the provided answer options, Option A is the best description of how the company will use these certificates. One key pair will be used for encryption and decryption, while the other will be used to digitally sign the data.
The encryption key is used to encrypt the data before it is sent over a network or stored on a device. Only the decryption key, which is kept secret, can be used to decrypt the encrypted data. This ensures that only the intended recipient can read the data.
The digital signature key, on the other hand, is used to sign the data to ensure that the recipient can verify the authenticity of the data and the sender. A digital signature is created by using the private key to encrypt a hash of the data, and the recipient can verify the signature by using the public key to decrypt the hash.
Option B is not an appropriate use of dual key pairs since providing extended validation requires a different process. Option C is also incorrect since encrypting the data twice would not necessarily double the confidentiality and non-repudiation strength, but may increase the processing overhead. Option D is also not a valid use case since internal and external communication can be secured using the same key pairs.
In summary, the best approach for the company is to use one key pair for encryption and decryption and the other for digital signing to ensure confidentiality and non-repudiation of the data transmitted.