The purpose of this study is to determine the consistency of signatures and the reliability of verification across various devices. These devices include an iPad (with finger and stylus) and digitizers (back-lit and non-back-lit) for the purpose of electronic consent. This study was conducted using two to four (varied for each device and person) signatures per team member and then cross-comparing every combination of signature to determine the stability of using the algorithm across various devices with a given threshold.