CifeProject

Implemetation of different encryption\decryption algorithms test

• Huffman
• LZ77
• Deflate

• usage:
• -e Huffman "text_to_encrypt"
• -d Huffman "text_to_encrypt"
• -e LZ77 "text_to_encrypt"
• -d LZ77 "text_to_encrypt"
• -e Deflate "text_to_encrypt"
• -d Deflate "text_to_encrypt"

Huffman encoding

• encoded sequence is represented as:
  • 1 byte long number - dictionary length
  • dictionary length times 1 byte long char and 1 byte long frequency
  • finally encoded message

LZ77 encoding

• encoded sequence is represented as:
  • sequence of chars and [Offset,Lenght] <- reference