deffie_helmen VS the rest

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Sep 16th, 2007
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Guys i m confused abt thi soncept....what th edifference between deffi-helmen an drest...i mean i know abt des, 3des etc....but what th edifference between these two groups an dwhat is deffi-helemen grouips?????? i cant get my head around it....thanks in advance

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lapascua06 Sun, 09/16/2007 - 23:04
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Hi,


DES, 3DES and AES are called Symmetric Encryption Algorithms (uses the same secret key to encrypt and to decrypt data). Question is, how do they come up with the secret key? This is where the task of Diffie-Hellman comes in. Diffie-Hellman is a key exchange mechanism used by encrypting peers to exchange public keys and use them in combination with their private keys to generate a shared secret key which would then be used by DES,3DES and AES to encrypt and decrypt information.


Diffie-Hellman groups are used in IKE to establish session keys.Variations in configuration can be 768-bit, 1024-bit, and 1536-bit.


Hope this helps....


Cheers,

lapascua


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