Chiffry Secure Messenger

In-app purchases
859 reviews
Content rating
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About this app

Chiffry is the first communication app with the quality label "IT Security made in Germany". This encrypted messenger allows you to send text and voice messages securely, share pictures, videos, contacts and locations confidentially and also make tap-proof phone calls.

- iOS


For encryption, Chiffry follows the BSI guidelines and uses the latest end-to-end encryption with 256-bit AES in GCM mode. All messages and telephone calls are encrypted on the sender's device and decrypted on the recipient's device. The encryption key is regenerated before each message or telephone call and is transmitted to the recipient according to the mailbox principle using modern elliptic curve cryptography (512-bit ECDH). In addition, all messages with 512-bit ECDSA signatures are forgery-proof and every user is identified thanks to encryption certificates. For comparison: online banks generally use 2,048 to 4,096-bit RSA encryption. The 512-bit EC encryption used by Chiffry corresponds to 15,500-bit RSA encryption. The effort to guess this key is at least 3.4 * 1038 times higher. (Sources: BSI TR-02102-1, TR-03111)


At Chiffry, data protection is a priority. The data transfer is carried out via the Chiffry communication servers. Those are located in envia TEL's high-performance data-centre, which is one of the most secure in Germany and meets the highest requirements for security, connectivity and availability. It is certified according to IT security standard ISO 27001 & management standard ISO 9001. Only telephone number and public keys for communication are recorded on the Chiffry server during registration. All messages remain on the server in an encrypted state until they are delivered to the recipient and are deleted after delivery or after 21 days at the latest. End-to-end encryption means that neither Chiffry employees nor third parties can access the content of these messages, as the encryption key is only located at the sender and recipient's premises to encrypt and decrypt information.


- Tap-proof encrypted phone calls
- Sending voice and short messages confidentially
- Share pictures, videos, contacts and locations confidentially
- Sending encrypted messages and notes
- Encrypted chat and group chat with up to 10 members
- Free phone calls via Internet

All smartphone users can install and use the basic version of this encryption app for free. In addition, users of this security app for mobile phones can make tap-proof encrypted calls with their smartphone and tablet free of charge.

The paid premium version includes significantly more security and comfort functions and offers extensions in the basic functions (including larger files, more group members, etc.). This version is suitable for private and business users who place particular emphasis on security or who want to use additional functions of the Premium version.
The business version is designed for public authorities and companies and includes special solutions such as communication via your own chiffry server as well as optional integration of your own corporate design, use of special smartphones with hardened operating systems and integration of other hardware components.


Updated on
Dec 13, 2023

Data safety

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 parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info and App info and performance
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

841 reviews
Lubna Abid
December 9, 2021
I am happy that this app is available for windows phone.Very nice app.I really like it.But some registeration problem.Please update the app also for windows phone.
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Yurgen Levandovskiy
June 8, 2022
Great messenger with very strong encreepting alghorithm.
1 person found this review helpful
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A Google user
November 17, 2016
After sync I get users who dont even have chiffry installed [?]
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What's new

Changes in this version include:

- improved description of In-App-Purchase