One-sided negotiation is a cost riser. The last thing a client should be able to tell is that the payer has very deep pockets; if I know you can afford billion

One-sided negotiation is a cost riser. The last thing a client should be able to tell is that the payer has very deep pockets; if I know you can afford billions, I might ask a ridiculous price and expect you to not know any better or not care about paying it. An excellent use of secrecy technologies would be government contracts: partition problems into pieces that don’t necessarily reveal the final purpose or customer (e.g. “choose uniformly between A and B” is too vague to be guessed as a requirement from only a government agency). Then, anonymously ask for bids. That way, you might actually get the developer who offers a measly price for a trivial task, and only finds out later that his check is from the government.