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Modern symmetric ciphers des - PowerPoint PPT Presentation

Why Computer Security

Why Computer Security

Why Computer Security. The past decade has seen an explosion in the concern for the security of information Malicious codes (viruses, worms, etc.) caused over $28 billion in economic losses in 2003 and $67 billion in 2006! G-20 Urged to Treat Cyber-Attacks as Threat to Global Economy (2013)

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937 views • 93 slides
Announcement

Announcement

Announcement. Grading adjusted 10% participation and two exams 20% each Newsgroup up Assignment upload webpage up Homework 1 will be released over the weekend. Review. What is security: history and definition Security policy, mechanisms and services Security models. Outline.

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436 views • 42 slides
Outline

Outline

Outline. Overview of Cryptography Classical Symmetric Cipher Modern Symmetric Ciphers (DES). Basic Terminology. plaintext - the original message ciphertext - the coded message cipher - algorithm for transforming plaintext to ciphertext

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526 views • 40 slides
Outline

Outline

Outline. Overview of Cryptography Classical Symmetric Cipher Modern Symmetric Ciphers (DES). Basic Terminology. plaintext - the original message ciphertext - the coded message cipher - algorithm for transforming plaintext to ciphertext

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594 views • 40 slides
Outline

Outline

Outline. Overview of Cryptography Classical Symmetric Cipher Modern Symmetric Ciphers (DES). Basic Terminology. plaintext - the original message ciphertext - the coded message cipher - algorithm for transforming plaintext to ciphertext

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411 views • 40 slides
Outline

Outline

Outline. Overview of Cryptography Classical Symmetric Cipher Modern Symmetric Ciphers (DES). Basic Terminology. plaintext - the original message ciphertext - the coded message cipher - algorithm for transforming plaintext to ciphertext

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406 views • 40 slides

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