Ipad security. Will vpn cover this?

[Greygoose_ipad]

IM doing more and more with my iPad lately, but It recently dawned on me that my transmissions from my iPad when on a public network are not secured. I'm looking for a solution that will protect my outgoing messages when on a a public network. I'm considering using hamachi as a VPN, but from what I've read , it looks like it only sets up security between two computers. Is this not the case.? Will hamachi secure my outgoing data transmissions when on a public network?

Thanx

Greygoose