2
3
i have been wondering and surfing the net on the differences and processes of Md5, blowfish and twofish encryption algorithms but i cant find an exact answer, im a noob though..be gentle..any answers would be a great help..
RedKing
Posted 2011-02-21T13:07:40.080
Reputation: 422
5
Not really sure what you're after, but you have to differentiate between encryption and hashing.
Example Encryption Algorithms:
Example Hash Algorithms
Encryption is a reversible process, where you can get back your original data.
Hashing is a one-way process, that can boil all your data down to a 20-byte "fingerprint".
Just to expand on hashing:
20 MB file
|
˅
[MD5 hash]
|
˅
0xe57262ce00045e850fd5392073a6e9cd
Hashing is very different from encryption. If you hash your data you cannot get it back.
Imagine hashing is like modulo addition:
37
+69
+28
===
134 mod 10 = 4
Or more graphically:
37,69,28
|
˅
[Ian's hash algorithm]
|
˅
4
A hash is used to generate a "fingerprint" of your data. It is one way, and not reversible.
Since you are using a "chat" program, i assume you are want to encrypt the messages. For that you need an encryption algorithm, not a hashing algorithm.
Ian Boyd
Posted 2011-02-21T13:07:40.080
Reputation: 18 244
i evaluated the Md5 encryption algorithm in Lan chat, result shows that in a Lan Chat that i have created using Md5 encryption the lesser the strings that i will sent to the client,, the longer the time it takes while in a larger string, the faster it transmits data..why is that? – RedKing – 2011-02-21T13:20:25.113
2Like Ian said, MD5 is not an encryption algorithm, it is a hash algo. It gives you back a 32 character string regardless how long the target string is and cannot be “unhashed” (you cannot get back the original string). What is probably happening is that because it gives a 32 character hash even for a 1-character string, you are getting a lot of overhead, which causes it to take longer. – Synetech – 2011-02-21T14:14:35.327
if the Md5 is irreversible..why is it that when i used Md5 for sending encrypted messages to a client pc, the client can still read what i have sent, it means the message that i have sent and encrpyted by the Md5 is decrypted when the client recieves it.. heres the main idea... "Send Message + Encrypt= Decrypt+ recieved.." – RedKing – 2011-02-22T12:05:59.847
1@iDarine: You are mistaken. Edit your original question to include the code you are using. – Ian Boyd – 2011-02-22T13:34:38.157