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How to encrypt sensitive information on mobile devices?

Created on 2025-07-10 15:51:56
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To encrypt sensitive information on mobile devices, you can use built-in encryption features or third-party apps. Here's how:

  1. Built-in Encryption (iOS & Android)

    • iOS: Apple devices automatically encrypt data when a passcode is set. Go to Settings > Face ID & Passcode (or Touch ID & Passcode) to enable a passcode, which activates encryption.
    • Android: Most modern Android devices offer encryption. Go to Settings > Security > Encrypt Phone (or Encrypt Tablet) to enable it.

  2. File-Level Encryption (Apps)

    • Use apps like Signal (for messages) or VeraCrypt (for files) to encrypt specific data.
    • For cloud-stored files, use apps like Cryptomator to create encrypted vaults before uploading.

  3. Cloud Storage Encryption
    If storing sensitive data in the cloud, encrypt it locally first. For example, use Tencent Cloud COS (Cloud Object Storage) with client-side encryption tools like Tencent Cloud KMS (Key Management Service) to manage encryption keys securely.

Example:

  • Encrypt a PDF file using VeraCrypt, then upload it to Tencent Cloud COS. Even if the cloud is compromised, the file remains unreadable without the decryption key.

For enterprise-level security, Tencent Cloud provides SSL/TLS certificates for secure data transmission and Tencent Cloud CVM (Cloud Virtual Machine) with disk encryption options.