Chiffry Secure Messenger was an overall app developed by Chiffry GmbH. It was removed from Google Play Mar 17, 2026 and is no longer available for download.
Download Statistics
User Ratings
The app had no ratings.
App Information
Chiffry Secure Messenger was free to download. The APK download size was 29.31 MB. The last available version was 1.0.88. The last update was on November 3, 2023.
Technical Requirements
The app had a content rating of Everyone. The app had been available on Google Play December 2014.
Description
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.
MOST MODERN SECURITY FUNCTIONS
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)
SECURE DATA TRANSMISSION
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.
FEATURES OF THE BASIC VERSION:
- 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.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
