In addition to the static signature image, which is visibly inserted into the document by the Software API, encrypted and compressed dynamic biometric data is embedded into the document. This includes vertical, horizontal, and pressure components, as well as temporal evolution, including acceleration, that the StepOver Hardware API outputs after encryption (4-dimensional signature data). This biometric data can be used in the event of a legal dispute at a later stage or confirmed in real time if an identity check is required. Verification based on a signature reproduced on paper is also possible.

The Software API combines the security of the hash algorithms, such as SHA512, with up to 4096-bit RSA encryption, based on two asymmetric key pairs. The Software API offers the highest level of security possible when combined with StepOver signature pads, as the encryption takes place directly in the hardware. Therefore, it is not possible to change a document after signing it without this being detected by a verification process. It is also impossible to insert the signature into another document, since the biometric data is embedded within the document and encoded with the document content using an asymmetric encryption algorithm (public key). The second key pair of the procedure allows you to identify the user digitally if desired.

• Bi-asymmetric encryption up to RSA 4096 bit
• Secure checksum generation, e.g. with SHA512
• Embedding of the signature image and biometric data in PDF/A documents
• Possibility of contacting our developers
• PDF/A documents signed with the Software API are 100% compatible with PDF/A documents signed using eSignatureSuite and EasySigner
• Compatible with document display mode and signing in a document mode for StepOver signature pads with color screens