Digital signature system based on a cloud of dedicated local devices

A system for generating a digital signature comprising:

• a computing device configured to receive a request for a digital signature and to communicate a message to each of a first security and a second security device,
• wherein the first security device associated with a signer configured to generate and store a first private key and, in response to receiving the message, generate a first signature based on the message and the first private key;
• wherein the second security device associated with the signer configured to generate and store a second private key, the second private key being generated independently from the first private key and, in response to receiving the message, generate a second signature based on the message and the second private key;
• and
• wherein the computing device is remote from the first security device and the second security device, and wherein the computing device is configured to:
• after communicating the message and responsive to receiving the independently generated first and second signatures, generate a composite cryptographic signature based on the first signature and the second signature;
• and
• append the composite cryptographic signature to a digital document comprising the message or a message digest.