Digital Signing Service
The Digital Signing Service is the first solution on the market to do this.
Other deployments require you to source these components separately
and set up your application to make separate calls to each service, which requires internal development resources with advanced cryptography knowledge.
The Digital Signing Service makes it easy for document workflow or management service providers to implement digital signatures and seals using one restful API call – no internal cryptographic expertise is needed and the service scales to accommodate growing client bases (up to thousands of signatures per second).