ENCRYPTION

Under Homomorphic Scheme, Epk(m1)+ Epk(m2)= Epk(m1+m2)
Is there any algo or method I can use for the following operation:
m1 + Epk(m2)= Epk(m1+m2)
In this operation, both m1 and m2 are numbers. Can you add the
plaintext into the ciphertext without encryption or decryption?
Technorati Tags: Homomorphic Scheme, encryption, decryption, ciphertext, plaintext

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This event will be held in San francisco, 10th-12th march 2008
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