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Segurança da informação Com exercícios resolvidos by Brahim Lejdel

Segurança da informação Com exercícios resolvidos

by Brahim Lejdel
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Book cover type: Paperback
  • ISBN13: 9786209643958
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Edicoes Nosso Conhecimento
  • Publisher Imprint: Edicoes Nosso Conhecimento
  • Publication Date:
  • Pages: 72
  • Original Price: GBP 38.19
  • Language: Portuguese
  • Edition: N/A
  • Item Weight: 109 grams
  • BISAC Subject(s): General

Este livro apresenta uma explora��o fundamental da seguran�a da informa��o atrav�s da lente da criptografia, passando dos sistemas cl�ssicos aos modernos. Come�a por ilustrar a encripta��o de chave sim�trica com a cifra de Hill, que transforma os dados utilizando �lgebra linear, e introduz o conceito de segredo perfeito com o bloco de tempo �nico, ao mesmo tempo que assinala as suas limita��es pr�ticas na gest�o de chaves. O n�cleo do texto aprofunda-se depois na criptografia de chave p�blica, exemplificada pelo RSA, que resolve o problema da distribui��o de chaves atrav�s de chaves p�blicas e privadas ligadas matematicamente. Ao longo dos exemplos, o livro enfatiza li��es pr�ticas fundamentais: a necessidade de utilizar chaves suficientemente grandes, a import�ncia da codifica��o e do preenchimento adequados e o facto de a seguran�a depender n�o s� de algoritmos fortes, mas tamb�m de uma implementa��o robusta e da prote��o de chaves. Em �ltima an�lise, enquadra a seguran�a da informa��o como uma disciplina din�mica e estratificada que requer uma adapta��o constante para equilibrar a confidencialidade, a integridade e a disponibilidade contra amea�as em evolu��o.

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