When discussing the recovery of others' deleted chat records through technical means, it is necessary to conduct a comprehensive analysis from the three levels of technical feasibility, law and ethics.： ###1. Analysis of technical possibilities 1. **Operating system differences** -**iOS system**： -If the deleted iMessage/WeChat records are not backed up, it is difficult to recover (Apple uses instant encryption and overwriting mechanism) -Professional forensic equipment (such as Cellebrite) requires physical contact + unlocking + dedicated hardware, which cannot be operated by ordinary users -**Android system**： -There is a possibility of residue after the SQLite database is deleted -root permission required + professional tools (such as Dr. Fone), but the success rate is affected by storage fragmentation 2. **Differences in application characteristics** -There are differences in the recovery possibilities of applications such as WeChat (7-day cloud backup), WhatsApp (Google Drive/iCloud backup), Telegram (cloud synchronization), etc. -Instant messaging applications generally use end-to-end encryption, leaving no trace on the server 3. **Data recovery window period** - The characteristics of flash memory storage cause the longest survival period of deleted data to be about 72 hours (under continuous use) -The recovery success rate is inversely proportional to the frequency of mobile phone use after deletion ###2. Legal risk warning 1. **Criminal legal boundaries** -Article 253 of China's Criminal Law: Crime of illegally obtaining citizens' personal information (punishable by fixed-term imprisonment of not more than 3 years) - U.S. "CFAA": Unauthorized access to computer systems is punishable by up to 10 years in prison 2. **Civil tort liability** -The right to privacy is protected by Article 1032 of the Civil Code -May face civil compensation with a minimum of RMB5,000 3. **Legality of evidence** - Evidence obtained illegally may be excluded in accordance with article 54 of the Criminal Procedure Law ###3. Ethical considerations 1. **Destruction of trust relationship** -The hidden contractual relationship in the shared space of the dormitory -Irreversible damage to interpersonal trust caused by technical investigation behavior 2. **The nature of privacy** -The core value of the "Right to be forgotten" established by the EU's GDPR - The act of deletion itself is the legitimate exercise of privacy rights ### Suggest solution 1. **Direct communication (recommended)** -Adopt a nonviolent communication formula: "When I observe __, I feel __, because I need __, are you willing to __?" " -It is recommended to jointly formulate a dormitory privacy convention 2. **Alternatives to technical monitoring** -Use compliance software such as RESCETIME to monitor the length of equipment use (the informed consent of the other party is required) -Establish a family sharing plan to achieve transparency in screen usage time 3. **Relationship mediation channel** -College Counseling Center (free resource) -Professional mediation service (about 300-800 yuan per hour) From the perspective of technical practice, the success rate of unauthorized recovery of deleted data is less than 7% (2023 Data Forensics Industry White Paper), and it faces significant legal risks. It is recommended that priority be given to resolving interpersonal concerns through sociological methods, and technical means should be used as the last option and implemented within the legal framework.