I wrote a web service. I call it "ShareDiscreetly". Creative name, huh?
I wrote the server in C# .NET 4.0. It runs as a Windows service.
ShareDiscreetlyWebServer serves a single purpose: to allow two people to share little bits of information - secrets - such as passwords, etc., in a secure, discreet manner. The secrets are protected both in transit and at rest, using the FIPS-approved AES-256 algorithm with asymmetric keys supplied by an X.509 certificate.
Oh, and I made sure that it's thoroughly compatible with Powershell so that the server can be used in a scriptable/automatable way.
You can read a more thorough description of the server as you try it out here.
Please let me know if you find any bugs, exploits, or if you have any feature requests!