$2,500 for a 5-user development team license.

ProofMark SDK

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ProofMark SDK As a software developer, you need a robust, cryptographically air-tight solution to guarantee data integrity in the systems you build. But most OS-generated date/timestamps are essentially useless for proving the state of data at a particular point in time. That's because they're so easily manipulated.

The ProofMark Software Developers' Kit (SDK) is the answer. The ProofMark SDK is an easy to implement system that utilizes public-key cryptography to create an irrefutable record of the time-existence and exact composition of any digital data. With the ProofMark SDK, you can integrate world-class data integrity safeguards into virtually any application you're building: quickly, painlessly and (most importantly) cost-effectively.

Using ProofSpace's patented Transient Key Technology, a ProofMark server issues a certificate that contains the proof for an online event of what someone did, when they did it, and who they were. A ProofMark certificate shrink-wraps any type of digital data using public-key cryptography, proving its authenticity at a particular point in time.

The ProofMark system then distributes the proof of the existence of the private key used to create the ProofMark certificates over a network of servers. This provides independent verification from outside of the organization that created the ProofMark certificate. In addition, the ProofMark system verifies the timestamp included in the ProofMark certificate by crosschecking the time across servers.