Secret Keeper
Everyone
info
5+
Downloads
Everyone
Learn more
About this app
Secret Keeper is a standalone end-to-end encryption tool. It turns any
communication channel into a secure one: encrypt a message or a file, send
the result over a regular messenger or e-mail, or show it as a QR code —
only the intended recipient can decrypt it.
NO SERVERS, NO ACCOUNTS
• The app is fully offline: no sign-up, no phone number, no e-mail.
• Keys are generated on your device and never leave it.
• We collect no data at all — there is simply nowhere to send it.
CRYPTOGRAPHY
• Modern standard algorithms: X25519 + AES-GCM.
• Your identity is a 12-word seed phrase: it restores your profile on a
new device.
• Your address is a short string / QR code that is safe to share openly.
• The envelope format is open and documented (secretkeeper.net).
ACCESS PROTECTION
• PIN code and biometrics (Face ID / Touch ID / fingerprint).
• Duress PIN: a separate code that opens an empty profile.
• Automatic wipe after several failed PIN attempts.
• Locks when the app goes to background; screenshot protection (can be
turned off).
MESSAGING AND FILES
• Offline chats: per-contact message history, stored encrypted.
• Encrypt files of any type (.skf) — photos, videos, documents.
• Backup is a single encrypted file (.skb): its contents can only be
opened with your seed phrase.
INTEGRATIONS
• Tetatet Chat: link the apps and secret messages get delivered online
automatically.
• The Secret Keeper browser extension encrypts right on websites.
• Passwordless sign-in to services via QR (SK Login).
WHO IT IS FOR
Anyone who values privacy: personal correspondence, passwords and codes,
documents, medical and financial data. Secret Keeper requires no trust in
a middleman — verifiable cryptography instead of promises.
Open protocol specification: https://secretkeeper.net/protocol
Privacy policy: https://secretkeeper.net/privacy
communication channel into a secure one: encrypt a message or a file, send
the result over a regular messenger or e-mail, or show it as a QR code —
only the intended recipient can decrypt it.
NO SERVERS, NO ACCOUNTS
• The app is fully offline: no sign-up, no phone number, no e-mail.
• Keys are generated on your device and never leave it.
• We collect no data at all — there is simply nowhere to send it.
CRYPTOGRAPHY
• Modern standard algorithms: X25519 + AES-GCM.
• Your identity is a 12-word seed phrase: it restores your profile on a
new device.
• Your address is a short string / QR code that is safe to share openly.
• The envelope format is open and documented (secretkeeper.net).
ACCESS PROTECTION
• PIN code and biometrics (Face ID / Touch ID / fingerprint).
• Duress PIN: a separate code that opens an empty profile.
• Automatic wipe after several failed PIN attempts.
• Locks when the app goes to background; screenshot protection (can be
turned off).
MESSAGING AND FILES
• Offline chats: per-contact message history, stored encrypted.
• Encrypt files of any type (.skf) — photos, videos, documents.
• Backup is a single encrypted file (.skb): its contents can only be
opened with your seed phrase.
INTEGRATIONS
• Tetatet Chat: link the apps and secret messages get delivered online
automatically.
• The Secret Keeper browser extension encrypts right on websites.
• Passwordless sign-in to services via QR (SK Login).
WHO IT IS FOR
Anyone who values privacy: personal correspondence, passwords and codes,
documents, medical and financial data. Secret Keeper requires no trust in
a middleman — verifiable cryptography instead of promises.
Open protocol specification: https://secretkeeper.net/protocol
Privacy policy: https://secretkeeper.net/privacy
Offline encryption for messages and files. Keys never leave your device.
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
- No data shared with third partiesLearn more about how developers declare sharing
- No data collectedLearn more about how developers declare collection
What’s new
• Attach photos and videos: take a photo, record a video, or pick from your gallery right in the chat composer.
• Backups, reworked: the Data tab shows the status of your backup file and how many changes it is behind. Choose where to keep the file — on the device or in OneDrive, Google Drive and other clouds — with clear step-by-step guides, and autosave keeps it up to date.
• Restoring made simple: a guided flow helps you
• New "Our apps" section in Settings.
• Fixes and polish throughout.
• Backups, reworked: the Data tab shows the status of your backup file and how many changes it is behind. Choose where to keep the file — on the device or in OneDrive, Google Drive and other clouds — with clear step-by-step guides, and autosave keeps it up to date.
• Restoring made simple: a guided flow helps you
• New "Our apps" section in Settings.
• Fixes and polish throughout.
Everyone
Learn moreApp support
phone
Phone number
+902123654000
About the developer
PAYMASTER TECHNOLOGIES ELEKTRONIK PAZARLAMA DIS TICARET LIMITED SIRKETI
developer@paymastech.com
Merkez mah Kagithane cad
no 11 Dap Vadisi A block apt 61
34406 Istanbul (Europe)/İstanbul
Türkiye
+90 506 048 86 10
