Cyph — Encrypted Communication

3.1
53 reviews
5K+
Downloads
Content rating
Everyone
Screenshot image
Screenshot image

About this app

Cyph is a quantum-resistant secure communication tool designed to be friendly for users of any technical skill level. The technology underpinning Cyph — built by former SpaceX engineers, presented at Black Hat and DEF CON, and protected by several US patents — has been rigorously vetted with great success by German pentesting firm Cure53 against a threat model that focuses on nation-state-level attacks.

Staying safe online has never been so easy.
Updated on
Jul 15, 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.
This app may share these data types with third parties
Personal info and App info and performance
This app may collect these data types
Personal info, Messages and 3 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

2.9
52 reviews
Eyal Kalderon
March 29, 2021
I couldn't launch the app on my phone; it stayed stuck on an empty screen. The Web presence looks a bit shady, I see some curious Google results on this project, and the direct email marketing strategy toward privacy-conscious users felt somewhat tone-deaf, IMO. I can't seem to be able to delete my newly-created account through the Web UI, but I was apparently able to deactivate it. Not sure if I'll try this service again, but maybe in a few years. For now, I'll be sticking with Keybase.
4 people found this review helpful
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JG SW
July 17, 2022
Appears to be a great app. Unfortunately, it requires google play services in order to reliably deliver messages. It's unfortunate seeing as how not every device has it, and not everyone wants it. We have many devices here with and without google play services. Please consider a workaround. Appreciate your work. Thanks.
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Stratos Gerakakis
July 29, 2020
Nowhere near as stable or mature as the Keybase app. As many people already reported there is no way to register or scan the qr code. Key too long to type by hand, had to electronically copy the clipboard to the phone. Really wanted to like an alternative to Keybase but this app still needs toooo much work....
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What's new

• General application-wide UI/UX polish
• Performance improvements for Accounts and messaging
• Easier onboarding process
• Fingerprint locking
• Misc bug fixes

App support