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chapter 5 exam ccna 3

    chapter 5 exam ccna 3

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  • 1. High-strength encryption and authentication The digital certificate uses PKI -public key infrastructure technology, which uses a pair of matching keys for encryption and decryption. Each user sets a specific private key ( private key ) that is only known to him , and uses it to decrypt and sign; at the same time,chapter 5 exam ccna 3, he sets a public key ( public key ) , which is disclosed by himself, as Shared by group users, used for encryption and signature verification. When sending a confidential document, the sender uses the receiver’s public key to encrypt the data, and the receiver uses its own private key to decrypt the data. The encryption and decryption process is guaranteed by digital means as an irreversible process, that is, only the private key is used. It can be decrypted to ensure that the information reaches the destination safely and without error. Users can also use their own private key to process the sent information to form a digital signature. Since the private key is unique to the person, the identity of the sender can be determined and prevent the sender from denying the sent information. The recipient can also determine whether the information has been tampered with by verifying the signature. In the public key infrastructure technology, the most commonly used is an algorithm RSA algorithm, which is a mathematical principle into factoring the product of two prime numbers, encryption and secret using two different keys. Even if the plaintext, ciphertext, and encryption key ( public key ) are known, it is computationally impossible to derive the decryption key ( private key ) . According to the current level of computer technology , it takes thousands of years of computing time to crack the 1024 -bit RSA key currently used .

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Latest Cisco CCNA 200-301 Dumps

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Latest Cisco CCNA 200-301 Exam Information

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Exam Code: 200-301

Certification Provider: Cisco

Certification Exam Name:Cisco CCNA

Update Date: Apr 14,2021

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