Krypton Core is the new home for your SSH and PGP private key. Generate a new public/private keypair, pair your phone with one or more computers, and use SSH & Git as you normally would.

Every time you run an `ssh` on a paired computer, an ssh login request will be sent to your phone for your approval. If enabled, every time you do a `git commit` on a paired computer, Krypton will prompt you for your approval before the commit is PGP-signed. Krypton gives you full control over your keys; you always know when your private key is used.

No more accidentally uploading or sending the private key. Krypton helps you add your public key to GitHub, AWS, Google Cloud, DigitalOcean, Heroku, or any server that supports SSH.

Krypton combines the secure key storage of a USB smart card with a familiar mobile phone interface. The Krypton app performs SSH and PGP signatures without revealing the private key to a paired computer. A Krypton SSH key can be used without modifying any servers, allowing users to secure their GitHub, AWS, and Google Cloud SSH authentication without any changes to their infrastructure.

What's New

Version 2.3.2

Fixes 'kr transfer' functionality

[ detailed changelog: ]

Ratings and Reviews

4.6 out of 5

8 Ratings

8 Ratings

Fairly good


I like the idea, but this app has a really annoying bug: disabling the “approved” notifications does not work, so you will be inundated with notifications of automatically-approved connections.

Pretty Impressed so far.


I feel fortunate to have by chance stumbled on this app recently, & ironically almost as soon as I decided to finally try to figure out how to utilize SSH and encryption keys. Originally I wanted to use the encryption keys for the vnc app screens because i thought it sounded easier than dealing with logging on anytime i wanted to remotely connect. Instantly i had a hard time finding simple plain instructions on the basics of how to do so. Theres nothing even close to what this app does, at least nowhere that i have found. ( I looked quite a bit) This app literaly seemed to come out at the perfect time for me. Admittedly im not an expert on the subject but so far its been 100 % reliable, makes a complicated thing easy & convenient, & most importantly it seems to use secure practices in accomplishing those things, so far as i can tell. Finding quality software among crapware that infests the App Store is a rare event for me, but its really rewarding when you come across randomly awesome software like this that solves a problem to boot. Thanks you for the great work Dev(s).

Works great but WAAAY to many notifications


There doesn't seem to be any way to turn some of them off.


KryptCo, Inc.
44 MB
Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2017 KryptCo, Inc.


  • Family Sharing

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

You May Also Like