GhostCode: Hidden Messages

Northbound Apps

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GhostCode hides a real, encrypted message inside an ordinary photo. Pick any picture, write your message, and an on-device AI model ties your encrypted secret to the image. You get back a normal-looking photo — and only the people with your Key can read what's inside.

Send it in a group chat, a DM, or a message. To everyone else it looks like any other photo. To your people — fans, members, guests, friends — they open it in GhostCode (or share the photo to the app) and unlock the real message once they enter the Key you shared. One image. Two audiences. You decide who gets the real meaning.

WHAT MAKES IT DIFFERENT
• Pixel Ghosting: hide an encrypted message inside a normal photo — up to 4,000 characters, a whole letter, not a one-liner
• An on-device AI model bonds your secret to the image; your Key and your readable message never leave your phone
• The photo looks identical to the naked eye — no lock icon, no badge, nothing to scan
• Send it like any other photo — in a chat, DM, message, or email

WHAT YOU CAN DO
• Hide an encrypted message inside any photo (Pixel Ghosting)
• Or pack your encrypted message into a QR code that works on every device
• Protect everything with a Key (a passphrase) only you and your people know
• Set a self-destruct timer so a reveal stops working after your chosen window
• Failsafe: a decoy Key reveals an alternate message, while the real one stays under a different Key
• Decoy Link (QR mode): one QR, two destinations — a public page for everyone, the real one for people with the Key
• Scan a QR, or open a photo in GhostCode, to decrypt

GREAT FOR
• Event organizers — put a QR on the invite or flyer; outsiders get a normal page, your guests unlock the venue, time, and RSVP
• Creators and fan clubs — members-only links, bonus content, and early access behind one ordinary photo or QR
• Musicians and bands — a QR on the merch table: the public sees your profile, fans unlock tonight's setlist or afterparty
• Games, scavenger hunts, and ARGs — layered reveals and puzzle clues for your crew
• Anyone who wants one public artifact with a private layer for the people who have the Key

HOW IT WORKS
1. Write your message, pick a photo (or choose QR), and set a Key
2. GhostCode encrypts it on your device and bonds it to the photo (or builds a QR)
3. Share it — send the photo in any chat or message (QR codes can also be posted or printed)
4. Anyone with GhostCode opens the photo (or scans the QR), enters the Key, and unlocks it

PRIVATE BY DESIGN
• No account required — you never sign up or log in
• Your readable message and your Key never leave your device
• Strong, standard encryption: AES-256-GCM with passphrase hardening (Argon2id)
• Sensitive screens are protected, and your data deletion request is honored in-app

GHOST MODE (optional upgrade)
GhostCode is free to use, with a few daily limits. Ghost Mode unlocks:
• Unlimited protected creates
• Unlimited saved Keys
• Decoy Link and extended self-destruct timers
• Failsafe filters
Ghost Mode is a subscription billed weekly or yearly (with a free trial on the weekly plan). It renews automatically unless cancelled, and you can manage or cancel anytime from your store account. Full terms are shown on the purchase screen.

A NOTE ON HOW IT STAYS SECURE
Revealing a protected message needs a one-time check with GhostCode's verification service — this stops brute-force guessing and lets messages self-destruct or be revoked. GhostCode never sees your Key or your readable message. For photo (Pixel Ghosting) messages, your encrypted message is stored on GhostCode's servers for the message's lifetime, so it can be revealed and auto-deleted; it stays encrypted and can't be read without your Key. It's deleted at self-destruct or expiry, or right away when you request data deletion.

Questions or feedback? [e-mail]
Privacy Policy: https://moonsailsoftware.com/ghostcode/privacy/
Terms: https://moonsailsoftware.com/ghostcode/terms/

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GhostCode turns your private messages into encrypted secrets only the right person can unlock.

• Hide a message inside a QR code or an ordinary-looking photo
• No account and no sign-up — just create and share
• Strong on-device encryption: your message and key never leave your phone in readable form
• Messages can expire after they're opened

Thanks for trying GhostCode — we'd love your feedback!