A method of signing an electronic document using an Analog-to-Digital signature, performing the following steps: - generating by an electronic device a signature generation request file, performing - generation of a private key; - receiving an electronic document to be signed; - receiving an AD signature information associated with a user of the electronic device; - generating a first control sum based on the said electronic document; characterized in that it further comprises: - generating a second control sum based on the said AD signature information associated with the user of the electronic device; - generating a single numeric sequence based on the first control sum and the second control sum; - generating a digital signature by encrypting said single numeric sequence using said private key; - wherein said signature generation request file containing at least: an electronic address associated with said electronic device user, the electronic document to be signed, the AD signature information associated with the user, and the digital signature; - generating a final signature confirmation file, wherein said final signature confirmation file including a hyperlink to the electronic document to be signed and to the AD signature information associated with the user of the electronic device; - transmitting via an encrypted connection said final signature confirmation file to a server; - transmitting said final signature confirmation file to an electronic address associated with the user; - receiving by the server a confirmation response from the user; - transmitting to the electronic address associated with the user a file, containing the digital signature. - generating by an electronic device a signature generation request file, performing - generation of a private key; - receiving an electronic document to be signed; - receiving an AD signature information associated with a user of the electronic device; - generating a first control sum based on the said electronic document; characterized in that it further comprises: - generating a second control sum based on the said AD signature information associated with the user of the electronic device; - generating a single numeric sequence based on the first control sum and the second control sum; - generating a digital signature by encrypting said single numeric sequence using said private key; - generation of a private key; - receiving an electronic document to be signed; - receiving an AD signature information associated with a user of the electronic device; - generating a first control sum based on the said electronic document; - generating a second control sum based on the said AD signature information associated with the user of the electronic device; - generating a single numeric sequence based on the first control sum and the second control sum; - generating a digital signature by encrypting said single numeric sequence using said private key; - wherein said signature generation request file containing at least: an electronic address associated with said electronic device user, the electronic document to be signed, the AD signature information associated with the user, and the digital signature; - generating a final signature confirmation file, wherein said final signature confirmation file including a hyperlink to the electronic document to be signed and to the AD signature information associated with the user of the electronic device; - transmitting via an encrypted connection said final signature confirmation file to a server; - transmitting said final signature confirmation file to an electronic address associated with the user; - receiving by the server a confirmation response from the user; - transmitting to the electronic address associated with the user a file, containing the digital signature.