2a776 teknik enkripsi dan dekripsi data sesi2

CRYPTOGRAPH

Y

(Principles of Informatioan

security)

CRYPTOGRAPH

Y

CRYPTOGRAPH

Y

(Principles of Informatioan

security)

CRYPTOGRAPH

Y

CRYPTO GRAPHIA

CRYPTO GRAPHIA

SECRE

T

definition

Art and science of keeping message secure (Willliam Stallings)

The art of protecting information by transforming it (

encrypting it) into an unreadable format, called 

cipher text. Only those who possess a secret key can decipher (or decrypt) the message into plain text.

(Vangie Beal)

http

data

Encryption

&

Defi nition

Data encryption translates data into another form, or code, so that only people with access to a secret key (formally called a decryption key) or password can read it

Goal

The purpose of data encryption is to protect digital data

confidentiality as it is stored on computer systems and

transmitted using the internet or other computer networks.

Availability

Confidentiality

Encrypti

Various of

TRADITIONAL

CHIPER

TRADITIONAL

CHIPER

TRADITIONAL

CHIPER

TRADITIONAL

CHIPER

TRADITIONAL

CHIPER

TRADITIONAL

CHIPER

MODERN

CRYPTOGRAPHY

ECB

MODERN

CRYPTOGRAPHY

ECB

Pi = 01100010001110101001



Dipecah menjadi 4 bit

MODERN

CRYPTOGRAPHY

ECB

Pi = 0110 0010 0011 1010 1001

K = 1011 1011 1011 1011 1011

XOR= 1101 1001 1000 0001 0010

Geser 1 bit ke kiri

= 1011 0011 0001 0010 0100

Notasi Hex

MODERN

CRYPTOGRAPHY

ECB

Pi = 0110 0010 0011 1010 1001

(623A9)

Explain Otherwise cryptographic

algorithms