Purpose: Safekeeping for backup data.

Features:

• Output "cipher file" and "key file".
  
• Minimize encryption information in "cipher file".
  
• Not use password.
  

Algorithms:

• aes-256-ctr
  
• blowfish-448-ctr
  
• camellia-256-ctr
  
• cast256-256-ctr
  
• serpent-256-ctr
  
• shacal2-512-ctr
  
• sosemanuk-256
  
• twofish-256-ctr
  
• xsalsa20-256
  

To secure backup files for a long time ...

1. "Cascade Encryptor" does cascade encryption with multiple different algorithms.
   
   • Three encryption algorithms are selected at random.
     
   • All Encryption key is different.
     
   • Even if some of the encryption algorithms would be broken, cipher files are still secure.
     
2. "Cascade Encryptor" minimize information in cipher files.
   
   • From cipher file, anyone cannot find which encryption algorithms were used.
     
   • Encryption keys are not contained in encryption file.
     
   • IV(Initialization vector) are not contained in encryption file.
     
3. "Cascade Encryptor" maximize effective bit length of encryption keys.
   
   • "Password-Based Key Derivation" does not be used.
     
   • Maximum encryption key length is used.
     
4. "Cascade Encryptor" does several things.
   
   • By using "second_key.txt", decryptable person is limited.
     
   • Encryption keys are not reused.