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iOS.md

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PGP Tools & Commands for iOS

1. Install a PGP App

Since iOS does not support native GPG in the terminal, you need a third-party app:

1.1 Recommended Apps:

  • iPGMail – Paid app for managing PGP keys and encryption/decryption.
  • PGPro – Free, allows signing and encryption.
  • OpenKeychain (via iSH Terminal) – Works if using a Linux shell on iOS.

2. Generate a PGP Key (Using iPGMail or PGPro)

Inside the app:

  1. Go to Key Management.
  2. Click Create New Key.
  3. Set a name, key size (4096-bit RSA recommended), and passphrase.
  4. Save the key and back it up.

3. Import a PGP Key

Download or copy the public key to your iPhone.

Using iPGMail:

  1. Go to Key Management → Import Key.
  2. Select the key file (.asc) and import it.

4. Export a PGP Key

To export a public key:

  1. Go to Key Management in iPGMail.
  2. Select your key → Click Export.
  3. Send or save the exported .asc file.

5. Encrypt a Message

To encrypt a message:

  1. Open iPGMail or PGPro.
  2. Go to Encrypt → Enter the message.
  3. Select the recipient’s public key.
  4. Encrypt and copy the output.

6. Decrypt a Message

To decrypt a message:

  1. Paste the encrypted text in the decrypt section.
  2. Select your private key.
  3. Enter your passphrase.
  4. Decrypt and view the message.

7. Sign a Message

To sign a message:

  1. Open PGPro or iPGMail.
  2. Go to Sign Message and enter your text.
  3. Use your private key to sign the message.

8. Verify a Signed Message

To verify a signed message:

  1. Paste the signed message into the Verify section.
  2. Use the sender’s public key to check the signature.

9. Encrypt & Decrypt Files

Encrypt a File:

  1. Open iPGMail.
  2. Go to Encrypt File.
  3. Select the recipient’s key.
  4. Save or share the encrypted file.

Decrypt a File:

  1. Open the encrypted file in iPGMail.
  2. Select your private key.
  3. Enter your passphrase.
  4. View or export the decrypted file.

10. Backup & Restore PGP Keys

Backup Keys:

  1. Go to Key Management in iPGMail.
  2. Export and save your public and private keys.
  3. Transfer them securely to a backup device.

Restore Keys:

  1. Import your .asc key file back into iPGMail.