SpiderOak CrossClave is a multi-platform file-sharing collaboration software. It is meant to keep all members of your team or project on the safe by ensuring fully encrypted file transmission from end-point to end-point, and keep your team on the same page by keeping an up-to-date repository of your important files.
You've written up a contract and need it reviewed by several other members of your team. After saving the contract file, you upload it to a CrossClave room in which all of the members of your team that need to look at this file are also in. Each other member of your team can then download this file, make an amendment, then push the new file back to the CrossClave room. The original version you wrote is saved as a historical version and the latest version becomes what is available for download by other team members or yourself. All data transmission is handled securely by the CrossClave application and there is no chance for data integrity to be compromised while in transit.