„Freedom is your right. If you make that request, we will honour it.“ − Optimus Prime


Your Securify messages are fully protected by our Securify Protocol. Our security protocol is based on the technical specifications of the Signal Protocol developed by Open Whisper Systems and is therefore based on the established industry standard.


• Secure Authentication:
Entering your master password every time you start Securify ensures that only you can send and open Securify messages. Alternatively, you can easily use your device's biometric authentication mechanism to unlock Securify.

• Protect Securify Messages with Passwords:
Protect each Securify message with an additional password. You can also optionally send a password hint (e.g. a tan hint from a tan list you created with your conversation partner).

• Select Cryptographic Hash Function:
Choose between PBKDF2 with up to 10,000,000 iterations and Argon2, the winner of the Password Hashing Competition (PHC) 2015, to hash your Securify message passwords. Securify supports all three variants of Argon2 (Argon2d, Argon2i, Argon2id).

• One-Way Securify Messages:
Sent Securify messages can no longer be opened. Securify is designed so that only recipients can open Securify messages.

• Self-Destructive Securify Messages:
Received Securify messages can only be opened once and never again.

• No Data Track:
All traces of communication disappear two minutes after you send or open a Securify message. No one can ever prove anything to you.

• Capture, Customize, and Attach Photos:
Capture and edit photos without leaving Securify. Captured photos are not stored on your device.

• Session Management:
You can delete and rebuild existing Securify sessions at any time. You have full control.

More features:
• Set Access Lock for Password Protected Securify Messages
• Perform PBKDF2 Benchmark Tests
• Define Expiration Dates and Times
• Set Timers - Tick Tack, Tick Tack ...
• Receive Screenshot Notifications
• Configure View Protection
• And much more!


Securify can be used to a limited extent in the free version. You can purchase access to all Pro features through a one-time In-App purchase.


Securify works without your registration, phone number, email address or address book. We do not collect or store any information about you.

We do not have any servers on which we can store your data.


We are 100% self-financed. Under no circumstances will we represent the interests of external persons, companies or organizations at present or in the distant future.


If you have any questions or problems, you can contact us at



What’s New

Version 1.2

"At the heart of every legend, there is truth. A few brave souls unite to save the world. We can be heroes in our own lives, every one of us, if we only have the courage to try." – Optimus Prime

Hi everyone! We have some great improvements and new features for you!

• New: Voice Memos - You can now send voice memos!
• Argon2 (PCM Release) - Select either PBKDF2 or Argon2 as your cryptographic hash function under „Securify Settings“ > „Messages“ > „Password Protection“ > „Cryptographic Hash Function“.
• New: We added a new section under „Securify Settings„ > „Advanced“ called „Use iMessage apps“ that helps you to download, manage and delete iMessage apps.
• Fixed the order of received attachments.
• Fixed a bug that made it possible to send multiple Securify session messages one after the other.
• Changed the appearance of how a Securify message timer expires.
• Improved & changed App Store description & images.
• Fixed some annoying bugs.
• Under the hood fixes and improvements.

WARNING: Securify message send with this version are not compatible with older versions of Securify We have made many changes and we want you to have the maximum security experience. So make sure all your contacts update to the latest version of Securify before you continue writing Securify messages!

This update is #securified.

We are TextSecure B.V. Let’s get back to work.

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating


TextSecure B.V.
34.9 MB

Requires iOS 12.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, German

Age Rating
Rated 4+
© 2019 TextSecure B.V.
In-App Purchases
  1. Pro Version $0.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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