1. Review Video
Dina Dwi Maharani 3 D3 IT A

2. Cryptogrpahy 101 – The Basics
Cryptogrpahy adalah praktek dan teknik untuk mengamankan komunikasi dan data dalam adanya gangguan musuh

3. Cryptogrpahy 101 – The Basics
Video Topics :
Motivating Example
Ciphertext
Plaintext
Keys
Public Key Cryptography
Private Key Cryptography

4. Cryptogrpahy 101 – The Basics
I love you
I hate you
Public Forum
(Internet) m m
Bob
Alice
Cryptonium Pipe
Keterangan:
m = Pesan (Plaintext)
Eve
(Enemy)

5. Cryptogrpahy 101 – The Basicskd
Public Forum
(Internet) c m c’ E D
m or
error ke
Bob
Alice
Eve
(Enemy)
Keterangan:
m = Pesan (Plaintext) ke = Encryption Key kd = Descryption Key
c = Ciphertext E = Encryption Program D = Descryption Program

6. Cryptogrpahy 101 – The Basics
HTTPS, the Hyper-Text Transfer Protocol with Secure Sockets, uses both public and private-key crypto to secure communications.
Public key cryptography called elliptic curve Diffie-Hellman (ECDHE)
Private key cryptography called the Advanced Encryption Standard (AES)

7. How SSL Works Tutorial - with HTTPS Example
Why ssl Exists
Encryption
Identification
Hiding what is sent from one computer to another
Making sure the computer you are speaking to is the one you trust

8. How SSL Works Tutorial - with HTTPS Example
ENCRYPTION
Pesan
Pesan
Pesan

9. How SSL Works Tutorial - with HTTPS Example
Computers agree on how to encrypt
Server sends certificate
Encryption
Your computer says ‘start encrypting’
The server says ‘start encrypting’
All messages are now encrypted

10. How SSL Works Tutorial - with HTTPS Example
Company asks CA for a certificate
CA creates certificate and signs it
Who to trust
Certificate installed in server
Browser issued with root certificates
Browser trusts correctly signed certs

11. Thank You