Cryptology (encryption science) good example of the use of mathematics in our lives and has been used by people for secret communication for centuries. It’s used in wide area from personal data protection to country security today. Although encryption is made with computer programs with more complex methods today, it’s based on old mathematical methods.
E-BOOK about Cryptology
BASIC KNOWLODGES
USEGA AREA OF ENCRYPTION
Cryptology is used in many important fields such as smart devices,
e-signature, confidential communication, personal data security, retinal
scanning, fake money scanning, TV radio waves, fingerprint scanning and country
security etc... It is an indispensable part of our daily life.
ENCRYPTION TERMS
You can see below, some basic encryption terms: sender, reciever, plain alphabet, cipher alphabet, plaintext, ciphertext, key, encryption, decryption, breaking cipher.
.png)
ENCRYPTION TYPES
Monoalphabetic Type:Only one alphabet is used in this type.
Each letter in the plaintext, always corresponds to the one fixed letter in the
ciphertext. This type ciphers can be broken with the frequency analysis of
letters.
Polyalphabetic Type: More than one alphabet is used in this
type. Each letter in the plaintext, corresponds to different letters in the
ciphertext each time. Breaking of this type is more difficult than
monoalphabetic types. Frequency analysis method is not enough to break these
types. İt can be broken by Kasiski analysis.
Substitution Type: Each letter/symbol in the plaintext is
replaced by another letter/symbol according to key (secret rule).
Transposition Type: Only the places of the letters in the
plaintext are changed according to key
No comments:
Post a Comment