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Cryptology adalah cabang ilmu yg konsen membahas ttg komunikasi rahasia di semua aspek. "Cryptology dibagi dua bagian besar yaitu cryptography dan cyptanalysist.

Cryptography berasal dari dua kata dlm bahasa Yunani yaitu kriptos (menyembunyikan) dan graphia (tulisan).

cryptography berarti ilmu yg mempelajari teknik2 matematika yg berhubungan dgn aspek keamanan informasi seperti keabsahan, kerahasiaan integritas serta autentifikasi data.

Komunikasi td dilindungi oleh cipher dan code yg kita sebut sebagai cryptographic system.

Ada 4 Komponen cryptography yaitu :
1. Plain text : pesan yg dpt dibaca
2. Cipher text : pesan acak yg tidak bisa dibaca
3. Key : kunci utk melakukan teknik cryptography
4. Algorithm : metode utk melakukan enkripsi dan dekripsi.


Enkripsi sendiri merupakan proses mengubah plain text menjadi cipher text. Sementara dekripsi adalah kebalikannya. Mereka sama2 menerjemahkan cipher text ke plain text. Perbedaannya, cryptographer bekerja atas legitimasi pengirim atau penerima pesan sementara cryptanalysist bekerja atas nama penyadap yg tidak berhak.


Rangkuman 3 [M23124
     
 
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