Question on cryptation

[Lillen]

Isn't it just decompile pgp so that you see the sourcecode, inorder to see the math behind the cryptiation to create a key???

 

[pgp_protector]

Isn't it just decompile pgp so that you see the source, inorder to make a decryption of it???

Nope.
1) you don't need to decompile it, you can download the source -> http://www.symantec.com/connect/blogs/source-code-downloads
2) It uses a dual key system to encrypt / decrypt so even with the source, to decrypt the message you also need the Private Key.

http://www.pgpi.org/doc/pgpintro/

 

[Lillen]

I am not certain of what a private key is? doesn't the source include math behind the private key as well??

It should've

 

[pgp_protector]

I am not certain of what a private key is? doesn't the source include math behind the private key as well??

Check updated Links.

The source is the full public domain version, but without the private keys, you won't be able to decrypt the messages,

 

[Lillen]

I checked wikipedia, and it seems like it is the same square creating the public key as it is creating the private key... If I read the source wouldn't I get the math behind the private key as well??

 

[Lillen]

Oh i see private key = password. Key = password no??

 

[pgp_protector]

Oh i see private key = password.

Put VERY Simply, yes, but the key is much more than that.

 

[Lillen]

but isn't the encryption and decryption defined by the sourcecode in the program?

If i want to decrypt the encrypted messege "Hi Universe", and I define 'Hello' as 'Hi' and 'World' as 'Universe' the cryptation will say 'Hi Universe', but since I can see the definition or math used to encryption in the source, couldn't i figure out the messege without a key?

 

[pgp_protector]

but isn't the encryption and decryption defined by the sourcecode in the program?

It's defined by the math & the keys, it's a One way encryption.

The Text You Want To Encrypt

Your PUBLIC Key

-----BEGIN PGP MESSAGE-----
qANQR1DBwEwDVxlIeg7sAbABB/4l7HqfQvCChDk95imNRnPEusuLgZL+T1UtL+lY
5r7cNfAfizBZcyMt9umZuFCV2wqbQcvN5k04nQGMqXNpyWxEpYa9xLLfyWBBmlw8
yzZuUr/gdy96GvXgBmMJw31V3BUKfxoljb+C6Cwo+HUPVTPBRSZP2ZQRO3/XZ9P4
mWFHGe4il4WB7VJThcqnj8QfAm/UI3BDAqfD5TRj/hVWvTLZG11VVN+a7uZVaftZ
1v0SNTH1LGlZz2z06wKSBgkXn53cJFbSDPkzZmODLpzgHc0LF1ftbIydKuG8m8Gg
wErgBVoPdI29Y9OVRmpsR4eHc/gXs8uKUmnLaY/APrIThtfh0lUBet+ZXnbQSW74
GNl0wawEwvyDxB5C+y7TiCqPKhB5grJd6v8Jlr9ZgvTxqVVRsolemrEyDprGOLxo
kyqTTmJ5urD3TBveB75wzL1kA1/mNqOasHUF
=6No1
-----END PGP MESSAGE-----

Now even with the Message & Public Key, given it's a One Way Encryption, you still need the Private Key (And it's password) to decode the message.

 

[TerranceL]

I always wanted to use pgp protection in e-mails and such, then I realized I didn't have anything to say that was important enough to protect.

 

[Lillen]

I don't follow you... Lets assume you don't know hebrew at all, 'at all'. And I give you the word se'ir with hebrew letters, you will not understand it unless you have a dictionary. and given the dictionary you will see that se'ir means hairy goat referring to devils or othertimes just hairy.

Now doesn't the sourcecode contain the information how the original messege is tranlatied into encrypted messege - the dictionary?

 

[pgp_protector]

I don't follow you... Lets assume you don't know hebrew at all, 'at all'. And I give you the word se'ir with hebrew letters, you will not understand it unless you have a dictionary. and given the dictionary you will see that se'ir means hairy goat referring to devils or othertimes just hairy.

Now doesn't the sourcecode contain the information how the original messege is tranlatied into encrypted messege?

Did you read this link ? How PGP works

This section is helpful.

Public key cryptography

The problems of key distribution are solved by public key cryptography, the concept of which was introduced by Whitfield Diffie and Martin Hellman in 1975. (There is now evidence that the British Secret Service invented it a few years before Diffie and Hellman, but kept it a military secret — and did nothing with it. [J H Ellis: The Possibility of Secure Non-Secret Digital Encryption, CESG Report, January 1970])
Public key cryptography is an asymmetric scheme that uses a pair of keys for encryption: a public key, which encrypts data, and a corresponding private, or secret key for decryption. Youpublishyour public keytotheworldwhile keeping your private key secret. Anyone with a copy of your public key can then encrypt information that only you can read. Even people you have never met.

It is computationally infeasible to deduce the private key from the public key. Anyone who has a public key can encrypt information but cannot decrypt it. Only the person who has the corresponding private key can decrypt the information.

 

[Lillen]

But that doesn't answer my question. The process of turning original messege into encrypted messege must be stored in the sourcecode. or am i wrong?

 

[pgp_protector]

I always wanted to use pgp protection in e-mails and such, then I realized I didn't have anything to say that was important enough to protect.

Ah so you send all your personal letters via postcard I take it?

 

[pgp_protector]

But that doesn't answer my question. The process of turning original messege into encrypted messege must be stored in the sourcecode. or am i wrong?

Yes the software turns VIA A Public Key the message you're sending into a Encrypted Message.

But you Can't then decrypt that encrypted text with the Public Key, it' doesn't flow backwards.

The only way to then Decrypt the message is to us the Private Key.

Example if you have PGP you can search for my PUBLIC key.
Encrypt a message.
Post the Encrypted Message on the Forum.
And ONLY I can read it.

 

[Lillen]

So the private key contains the dictionary to translate the encrypted messege into readable text?

Do they have one private key for every user, or if you have one private key you have them all??

 

[pgp_protector]

So the private key contains the dictionary to translate the encrypted messege into readable text?

Do they have one private key for every user, or if you have one private key you have them all??

When you use the application, for each user you create a Key Pair (You did read the links right ? It's explained in the links)

The Key Pair is Two Keys
1) The Public Key you allow anyone to have
2) The Private Key Only You Keep.

I'd use Your Public Key to encrypt a message for you, post it on the forum.
John over their also has your public key and with it they post a message also for you.

I can't read what John wrote, John can't read what I wrote.
Only you with your PRIVATE Key can read both messages.

 

[Lillen]

I did not read everything in the links i have trubble reading things on the computer. It doesn't give me peace like a good book does. (right now i am trying to figure out intergrals from a math book without a teacher)

 

[TerranceL]

Ah so you send all your personal letters via postcard I take it?

I mean encrypting the contents of the e-mail before sending it.

I read years ago that there was an encryption out there that was so secure that the government couldn't break it thus it was banned.

Any truth behind that or is it as accurate as the Globe's batboy sightings?

 

[Lillen]

But the program, or the keys must hold information of how the messege is encrypted, no!??