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Keamanan Jaringan. Dosen : TIM PENGAJAR PTIK. Computer Security.

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Presentation Transcript
keamanan jaringan

KeamananJaringan

Dosen :

TIM PENGAJAR PTIK

computer security
Computer Security

The protection afforded to an automated information system in order to attain the applicable objectives of preserving the Confidentiality, Integrity, and Availability of information system resources (includes hardware, software, firmware, information/ data, and telecommunications).

outline
Outline
  • Kriptografi
  • KeamananJaringan & KomputerdiKehidupanSehari-hari
    • SegiFisik
    • SegiSistemOperasi
    • SegiPerangkatJaringan
    • SegiAplikasi
kriptografi1
Kriptografi
  • Kriptografi :
    • IlmudanSeniuntukmenjagakerahasiaanberita
  • ContohImplementasi :
    • Sandi Caesar (Caesar Cipher) :
      • Pesanasli :
        • MEET ME AFTER THE TOGA PARTY
      • Pesan yang diacak :
        • PHHW PH DIWHU WKH WRJD SDUWB
      • Rumus :
        • C = (P + K) mod 26
istilah dalam kriptografi
IstilahdalamKriptografi
  • Plaintext : Teks asli
  • Ciphertext : Teks yang telah dienkripsi
  • Key : Kunci
  • Cipher : Algoritma enkripsi
  • Enciphering/Enkripsi : Proses mengubah plaintext menjadi ciphertext
  • Deciphering/Dekripsi : Proses mengubah ciphertext menjadi plaintext
  • Cryptanalysis : Teknik mendekripsi pesan tanpa mengetahui detail dari enkripsinya
kategori kriptografi
KategoriKriptografi
  • Kriptografi dibagi menjadi beberapa bagian, yaitu :
    • Berdasar jumlah key yang digunakan :
      • Simetris (Contoh : AES, DES, RC4)
      • Asimetris (Contoh : RSA)
    • Berdasar pengolahan plaintext:
      • Block Cipher (Contoh : AES, DES, RSA)
      • Stream Cipher (Contoh : RC4)
antara switch hub dan wifi
AntaraSwitch, Hub, danWiFi

Switch

WiFi Access Point

Hub

contoh mitm attack
Contoh MITM Attack

Isipesan yang dikirimmenggunakanwifi

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