Cyph — Encrypted Communication

54 reviews
Content rating
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
Sep 15, 2021

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
App info and performance
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
54 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.
3 people found this review helpful
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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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Dan Walsh
July 28, 2020
Tried activation twice. Both times it just spun endlessly. Unfortunately until it actually works I can't give the app a proper rating. 1 star until activation is reliable because otherwise it's useless. Also, not a fan of the fact the founder was sending emails to random keybase users. I get it's business but that's spam.
6 people found this review helpful
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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