beauty of mathematic
DESCRIPTION
This slide is about the beauty of mathematics through one of the interesting case of study, CRYPTOGRAPHYTRANSCRIPT
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CRYPTOGRAPHYCRYPTOGRAPHY
Created by Pro$acK for SharingNewZ.comSEP080012
B. Sc Edu PhySic and Math
Outlines
Introduction1
The theories2
Closure4
Further explanation33
Introduction
Apa itu Cryptograpy Berasal daripada Cryptology dan graphein
yang bermaksud “tersembunyi/secret” dan “penulisan”.
Kajian dan pembelajaran tentang teknik untuk menghasilkan komunikasi rahsia daripada orang yang ketiga.
Macam mana ia berfungsi? Cryptographic algorithm(cipher) berfungsi
melalui proses encryption dan decryption mathematical function.
Introduction
Apa itu Encryption? Cara untuk menyamarkan sesuatu
textbiasa(plaintext) untuk melindungi isi kandungan.
Apa itu Decryption? Proses untuk reverse ciphertext(ayat
tersembunyi) kepada original plaintext(text biasa)
Modern cryptography intersects the disciplines of mathematics, computer science, and electrical engineering. Applications of cryptography include ATM cards, computer passwords, and electronic commerce.
Secure Communication
German Lorenz cipher machine, used in World War II to encrypt very-high-level general staffmessages
Jenis-jenis Cryptography
•Menghasilkan mesej melalui konsep bits.•Hanya boleh digunakan 1 kali sahaja.
One-time pad
•Menghasilkan mesej melalui konsep shift.•Antara teknik encrypt paling senang dan paling diketahui umum.
Caesar cipher
•Menghasilkan mesej melalui konsep linear algebra.•Teknik Encrypt pertama yang paling praktikal dan susah di decrypt kan.
Hill Cipher
One-time pad
EncryptDecrypt
Caesar cipher
Example:
Encryption of a letter can be describe as:
Decrypt is perform similarly
Hill Cipher
Hill's cipher machine, from figure 4 of the patent
Hill Cipher
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