Secure Connections 

2. Expand Security. 

3. Select 

SSH2 Security.  

4.  Select at least one Message Authentication Code from the MAC list. There are 

four to choose from: 

MD5 

SHA1 

SHA1 96 

MD5 96 

5. Select 

OK. CuteFTP tries each selected MAC with the server starting with the 

top method in the MAC list. 

T

O SELECT ENCRYPTION METHODS 

(

CIPHERS

) 

1.  From the menu, choose Tools > Global Options.  

2. Expand Security. 

3. Select 

SSH2 Security.  

4.  Select at least one encryption method from the Cipher list. There are five 

available encryption types:  

ARCFOUR  

Cast128  

Triple DES (3DES)  

Twofish 

Blowfish     

5. Select 

OK. CuteFTP Professional tries each selected encryption method with the 

server starting with the top method in the Cipher list. 

A

VAILABLE ENCRYPTION ALGORITHMS 

ARCFOUR: Arcfour is intended to be compatible with the RC4 cipher trademarked 

by RSA Data Security, makers of the famous PGP program. It uses a 128 bit key and 

provides good security.  

CAST128: This cipher is the CAST 128 cipher in CBC mode, with 128 bit keys.  

Triple DES (3DES): This algorithm uses a 24 bit  triple key  to encrypt data 3 times. 

The 24 bit key is split into 3 8 bit segments and each is used for encryption. Triple 

DES is fast, but not as strong as the other algorithms.  

Blowfish: The Blowfish algorithm is a public domain method using a 128 bit key. 

Blowfish was intended to be a replacement for 3DES. It provides good security.  

Twofish: Twofish is an improved version of Blowfish using a 256 bit key. It provides 

the strongest security available in CuteFTP Professional and should protect your data 

in most transfers.  

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