GPG Decrypt vs PGPony

This app is designed to allow you to read on your iPhone, files that have been encrypted on your Mac using GPG. The workflow is: 1. Encrypt a file on your Mac using GPG (AEAD - Authenticated Encryption with Associated Data, is not supported at the moment, see support page). 2. Transfer the encrypted file and your private key to your iPhone (using iCloud Drive, Dropbox, Google Drive, or any other cloud storage service) 3. Use this app to decrypt and view the file content on your iPhone This is particularly useful for securely accessing sensitive documents on your iPhone without storing the decrypted content permanently on the device. Features - Decrypt GPG-encrypted files - Support for private key authentication - Secure file handling with security-scoped resources - Display-only decryption (no persistent storage of decrypted content) Usage 1. Select the encrypted file you want to decrypt 2. Select your private key file 3. Enter the passphrase for your private key 4. Tap "Decrypt" to decrypt the file 5. The decrypted content will be displayed on screen. It is not saved to your device. GPG ([GNU Privacy Guard](https://gnupg.org/)) is a widely used open-source implementation of the OpenPGP standard. This app only supports asymmetric encryption (public/private key). It cannot decrypt files that were encrypted using symmetric encryption (password-only encryption). Using GPG on Mac OS - Install GnuPG: brew install gnupg - Generate a new GPG key: gpg --full-generate-key - Choose option 1 (RSA and RSA) - Choose 4096 bits - Choose 0 (key does not expire) - Enter your name and email - Enter a secure passphrase - Export your private key (required for decryption on iPhone): gpg --export-secret-keys --armor your-email@example.com > private_key.asc - Replace `your-email@example.com` with the email you used when creating the key - Enter your passphrase when prompted - The private key will be saved to `private_key.asc` - Transfer this file to your iPhone for use with the app - Encrypting a file: gpg --encrypt --recipient your-email@example.com your_file.txt - This creates `your_file.txt.gpg` - Transfer this encrypted file to your iPhone for decryption with the app Decrypting a file on Mac: gpg --decrypt your_file.txt.gpg > decrypted_file.txt - This will prompt for your private key passphrase - The decrypted content will be saved to `decrypted_file.txt` Transferring files to iPhone You can transfer the encrypted file and private key to your iPhone using various cloud storage services: - iCloud Drive - Dropbox - Google Drive - OneDrive - Or any other cloud storage service that provides iOS file access Security - All file operations use security-scoped resources - Passphrase is never stored - Files are copied to the app's documents directory for processing - Decrypted content is only displayed and not saved to the device - No persistent storage of sensitive information

PGPony makes PGP encryption easy, private, and powerful, and every feature is free. Generate keys, encrypt to people or to a password, sign and verify, back up your whole keyring, and revoke compromised keys, all from your iPhone and iPad, in eight languages. New in 8.3.0: post-quantum signatures, NIST P-256, P-384 and P-521 keys, messages to several post-quantum recipients, and a reorganized Key Detail screen. POST-QUANTUM Encrypt with ML-KEM-768 or ML-KEM-1024 paired with X25519, and sign with ML-DSA-65 paired with Ed25519 (RFC 9980), on RFC 9580 (v6) keys or the v4 shape GnuPG 2.5 reads. Add post-quantum subkeys to a key you already have. HARDWARE SECURITY KEYS Generate a key pair on the card over NFC, or add an existing card with a tap. Sign, decrypt, and encrypt-and-sign in one step, with RSA and ECC (Ed25519/Curve25519) keys, on YubiKey, Token2, and others, over NFC or USB-C. Full card admin: PINs, factory reset, and Card Details. ENCRYPT, DECRYPT & SIGN Encrypt messages and files of any size to one or many public keys, or to a password with no keys at all, readable by gpg -c and back. Pick which subkey to encrypt to when a key has more than one. Decrypt with a private key, a hardware key, or a passphrase, and see which of your keys opened the message. Sign without encrypting, including detached signatures, and verify a file against its signature. GENERATE & MANAGE KEYS Create keys on a card or in-app: post-quantum, v6 Ed25519, classic Ed25519 + Cv25519, or RSA 2048/4096, with or without an email address. Add, revoke, or remove subkeys (including authentication subkeys) and User IDs. Full OpenPGP v6 (RFC 9580), interoperable with Sequoia PGP and GnuPG. Import from files, clipboard, QR codes, or keyservers. Make revocation certificates and export private keys (GnuPG-compatible). BACK UP & RESTORE Save your whole keyring, secret keys included, as one encrypted file. A single backup code opens it, and the same file restores onto another device. The file stays with you, never on anyone's server. KEYSERVERS Look up a recipient by email through Web Key Directory, then key servers. Add your own servers, publish to several at once, and upload an updated key straight from Key Detail. Route lookups through Tor or a SOCKS proxy, or turn on offline mode to stop every network request. PASSWORD STORE Open a pass (password-store) folder, decrypt an entry with a software or hardware key, and copy it through an auto-clearing clipboard. SHARE SHEET EXTENSION Encrypt or decrypt text, encrypt a file, or sign a file in any app: Safari, Files, Notes, Mail. SECURITY FIRST Face ID / Touch ID lock with auto-lock. Software keys live in the iOS Keychain. Keys and messages from outside are checked strictly before they are used. No analytics, tracking, accounts, or sign-up. Your private keys never leave your device, and with a hardware key they never leave the card. EIGHT LANGUAGES English, German, Spanish, French, Japanese, Brazilian Portuguese, Russian, and Simplified Chinese. Built by an indie developer who cares about your privacy. Your keys, your messages, your data, always yours. Terms of Use (EULA): https://pgpony.app/eula.html Privacy Policy: https://pgpony.app/privacy.html