Questões de Concurso Comentadas sobre Inglês para TRE-PR

Q839499

Ano: 2017 Banca: FCC Órgão: TRE-PR Prova: FCC - 2017 - TRE-PR - Técnico Judiciário - Operação de Computadores |

Q839499 Inglês

Consider the figure below.

Imagem associada para resolução da questão

The correct way to describe the main concepts showing by the figure is:

If someone wants to send a private message, he gets the secret key (directly from the receiver in an e-mail) and use it to encrypt the message. For a message back to the sender, the receiver grab his secret key and encrypt with that. So all the encrypting is done with the secret keys, and all the decrypting is done with the corresponding public keys.

There's one major benefit to doing encryption this way: there is no need to send anything secret over an insecure channel. The public key goes out to the world, but it's not secret and it doesn't need to be. The private key can stay safe on a personal computer, where it was generated.

The secret key cryptography method, also called asymmetric encryption, employs a secret key for both encryption and decryption. The sender uses the key to encrypt the plain message and sends the encrypted message to the receiver. The receiver applies the same key to decrypt the message and recover the plain message.

Hash algorithms are typically used to provide a digital fingerprint of a plain message contents, often used to ensure that the message has been altered by an intruder or virus. Using public and secret keys, hash functions, then, provide a measure of the corruption of a message.

The public key cryptography method, also called symmetric encryption, employs two keys that are mathematically related although knowledge of one key does not allow someone to easily determine the other key. One key is used to encrypt the plain message and the other key is used to decrypt the cipher text.

Você errou! Resposta:

teste

Parabéns! Você acertou!

teste

, continue estudando de graça!

Você ainda pode utilizar recursos do QC de forma gratuita. Experimente!

Pratique resolvendo até 10 questões todos os dias!

Assista 1 aula de um curso preparatório todos os dias!

Veja comentários de até 10 questões todos os dias!

Veja todos os planos e recursos

A VITALÍCIA VOLTOU ♾️

A VITALÍCIA VOLTOU ♾️

Questões de Concurso Comentadas sobre inglês para tre-pr

Foi encontrada 1 questão

Resolva questões gratuitamente!

, continue estudando de graça!