In discussions involving sensitive or confidential information, ensuring that it is not detected requires a combination of technical means and operational security (OpSec) strategies. The following are some key recommendations, but please note: **All actions must comply with local laws and regulations**. Handling confidential documents may involve legal risks, so please be sure to evaluate carefully. --- ###**1. Security of communication channels** 1. **End-to-end encryption tool** -Use verified encrypted communication tools, such as **Signal** (default end-to-end encryption), **Telegram private chat** (non-default mode needs to be turned on manually) or **Element/Matrix** (open source decentralized platform). - Avoid using platforms such as WeChat, QQ, SMS, etc. that may be monitored or data retained. 2. **Anonymous identity and account** -Create an anonymous account that is only used for sensitive communications, and does not associate your real name, mobile phone number, or email address (such as registering with a temporary email address). 3. **Prevent metadata leakage** -Even if the content is encrypted, metadata such as communication time, frequency, and participants may still expose information. Change accounts regularly or spread the discussion time. --- ###**2. Safe handling of documents** 1. **File encryption** -Use **VeraCrypt** to encrypt files or create encrypted containers, or sign and encrypt files through **PGP/GPG** before transferring. -Compress encrypted files and set a strong password before transferring (it is recommended to use a password manager to generate). 2. **Avoid cloud storage** -Do not upload sensitive files to public cloud disks (such as Baidu Cloud, iCloud). For sharing, use **OnionShare** (point-to-point transmission via the Tor network). 3. **Anti-traceability mark** -Delete the metadata of the file (such as shooting time, device information), tools such as **ExifTool** (picture/document). --- ###**3. Network anonymity** 1. **Use Tor or VPN** -**Tor browser**Can hide IP and access the network anonymously, suitable for accessing dark Web services (such as the Tor version of the encrypted mailbox ProtonMail). -Choose a **trusted VPN** without logging (such as Mullvad, PROTONPN), but pay attention to the reliability of the VPN provider. 2. **Isolate the network environment** -Use dedicated equipment or virtual machines, avoid operating under commonly used networks (such as home/company WiFi), or use public WiFi (but need to cooperate with Tor/VPN). --- ###**4. Physical and equipment safety** 1. **Equipment isolation** -Use disposable equipment (such as second-hand mobile phones/computers), or equipment dedicated to sensitive operations, and do not install unrelated applications. 2. **System protection** -Enable full disk encryption (such as BitLocker, FileVault), and update system patches regularly. -Disable microphone, camera permissions, or physical blocking. 3. **Anti-eavesdropping/monitoring** -Avoid discussing in places where it may be recorded, and use white noise generators to interfere with recording equipment (use with caution). --- ###**Five, operating habits** 1. **Minimize information exposure** - Avoid direct mention of sensitive keywords and use pronouns or metaphors (but you need to agree with the other party in advance). -Delete local chat logs and files in a timely manner and erase them safely (tools such as **BleachBit**). 2. **Be wary of social engineering** -Verify the identity of the other party (such as through preset security issues) to prevent phishing links or attacks disguised as trusted contacts. 3. **Change strategies regularly** -Replace communication tools, account numbers, and equipment to avoid long-term fixed patterns being tracked. --- ###**6. Legal and Ethical warnings** -**Legality takes priority**: Ensure that the content of the discussion does not violate the law and avoid participating in illegal activities such as leaking state secrets and commercial espionage. -**Risk assessment**: Even if the technical means are complete, negligence of personnel (such as screenshots, loss of equipment) may still lead to exposure. --- **Final reminder**: Absolute safety does not exist, and the above methods can only reduce the risk. When it comes to highly sensitive information, it is recommended to consult a professional security officer or a lawyer.