1. A method to validate a digital signature for an electronic document, comprising: receiving, at a validation server and from a computing device, a request including the digital signature and a second digest, the digital signature including a first digest of the electronic document, the second digest being generated from a representation of the electronic document at the computing device; comparing, by the validation server, the first digest of the electronic document with the second digest; generating, by the validation server, a validation result for the digital signature based on the comparing, the validation result being generated independent of the electronic document being available to the validation server; and sending, by the validation server, the validation result for the digital signature to the computing device.
1. A method to validate a digital signature for an electronic document, comprising: receiving, at a validation server and from a computing device, a request including the digital signature and a second digest, the digital signature including a first digest of the electronic document, the second digest being generated from a representation of the electronic document at the computing device; comparing, by the validation server, the first digest of the electronic document with the second digest; generating, by the validation server, a validation result for the digital signature based on the comparing, the validation result being generated independent of the electronic document being available to the validation server; and sending, by the validation server, the validation result for the digital signature to the computing device. 4. The method of claim 1 , wherein the request further includes data collateral to core content of the electronic document, the data collateral to core content of the electronic document including at least one of a digital certificate that cryptographically binds a signer of the electronic document to the signer's public key, a timestamp associated with the electronic document, or auxiliary document information.