OpenBrIM.Sign provides an online document signing service that is both secure and private.
Neither the signing process nor checking the validity of a signature require the documents to be transferred to our servers, which means your documents never leave your local computer and the privacy of your files are protected.
A signature can contain both a private and public message attached to it. Public messages can be viewed by anyone who has the document. Private messages are only available to you.
A document can be signed multiple times by different users. The signature and the messages attached to the signatures do not modify the file - so the content of your files stay intact.
Any change made to the documents after you sign the document, immediately invalidates your signature. The document will need to be approved and signed again.