[compsciphd]

any verifiable voting mechanism opens oneself up to vote buying.

if I can use homomorphic encryption to verify my vote I can give the same info needed (say this 128 bit number) to someone else.

[monocasa]

Define "verifiable". There are absolutely schemes where I can't verify what my vote was after the fact, but can verify that it was counted.

[compsciphd]

verify that my vote was counted correctly. i.e. that my vote wasn't changed or fraudelently presented to me.

[monocasa]

You can do that with quite a few pen and paper systems today, without being to verify what you voted for after the fact.