https://github.com/joshua-riek/des

My implementation of the Data Encryption Standard (DES)!
https://github.com/joshua-riek/des

algorithm algorithms decryption des encryption python security

Last synced: 2 days ago
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My implementation of the Data Encryption Standard (DES)!

• Host: GitHub
• URL: https://github.com/joshua-riek/des
• Owner: Joshua-Riek
• License: gpl-3.0
• Created: 2022-10-24T20:43:07.000Z (about 2 years ago)
• Default Branch: main
• Last Pushed: 2022-10-29T23:50:54.000Z (about 2 years ago)
• Last Synced: 2024-12-16T08:11:09.311Z (6 days ago)
• Topics: algorithm, algorithms, decryption, des, encryption, python, security
• Language: Python
• Homepage:
• Size: 19.5 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
## DES

This is my implementation of the Data Encryption Standard (DES), a symmetric-key block cipher published by the National Institute of Standards and Technology (NIST).

Encryption: `C = E(K1, P)`

Decryption: `P = D(K1, C)`

```Python

# A simple example of encrypting a string with DES!

key = 0x133457799bbcdff1

des = DES(key)

cyphertext = des.encrypt('Hello World!', key)

plaintext = des.decrypt(cyphertext, key) 

```

## Triple DES

Triple DES (3DES or TDES) is a symmetric-key block cipher, which applies the DES cipher algorithm three times to each data block.

Encryption: `C = E(K3, D(k2, E(K1, P)))`

Decryption: `P = D(K1, E(K2, D(K3, C)))`

```Python

# A simple example of encrypting bytes with Triple DES!

key1 = 0x133457799bbcdff1

key2 = 0x0123456789abcdef

key3 = 0xfedcba9876543210

des = TripleDES(key1, key2, key3)

cyphertext = des.encrypt(b'Hello World!')

plaintext = des.decrypt(cyphertext)

```