PRS signal in acquiring evidence of Digital Chain of Custody

摘要

One of the main problems in the analysis of Digital Chain of Custody (CoC) in computer forensics is the traceability of the procedure of evidence. Generally, it is obtained by Corps and Forces of State Security and later it is examined and analyzed by forensic information experts. Therefore, the maximum guarantees both judicial and procedural are imperative for information sharing. However, the moment of capturing the proof has been cited as the most critical moment in the CoC. Consequently, in order to meet the exact capture place and right time, Global Positioning Satellite (GPS) has been proposed to be used by some authors. Another problem is created then: the possibility of attacks to capture system, based on jamming (interference) and spoofing (wrong place and time transmission) threats. To prevent the latter, this research work has been developed: the proposal for using encrypted signal of Public Regulated Service (PRS) which it is one of the signals of Galileo satellites. Thereby, the metadata of evidence will contain right and secure geolocation and time.