# Sudo Encrypt — RSA Message encryption

> RSA message encryption and decryption tool with iMessage integration. (iPhone/iPad app by Shunzhe Ma.)

- Source: https://appshunter.io/ios/app/sudo-encrypt/id1506468136 (this page in markdown: same URL + `.md`)
- Developer: [Shunzhe Ma](https://appshunter.io/developer/1052286218)
- Category: Utilities, Productivity
- Price: Free
- Rating: 4.67/5 from 6 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 2 MB
- Languages: English, Japanese
- Released: 2020-04-11
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/sudo-encrypt/id1506468136/reviews.md

## What is Sudo Encrypt?

- Generate RSA keypairs locally
- Import others' public keys and encrypt messages to send to others
- Decrypt messages others sent to you with your private key
- Sign / Verify message signature

Best of all, encryption and decryption of messages can be done directly in the iMessage app. When using the in-app extension, you no longer have to send a long piece of string, the encrypted message is embedded into an iMessage object so the other side can just click and decrypt.

## Key features

- Generate RSA keypairs locally
- Encrypt messages with public keys
- Decrypt messages with private keys
- Sign and verify message signatures
- iMessage extension for seamless integration
- Embed encrypted messages as iMessage objects

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/sudo-encrypt/id1506468136/reviews.md

### 4/5 — All great but

*2022-05-07*

This app is a great tool. There is some issue with the public key. When I export/copy public key and try to encrypt somewhere else using this public key. I see some issue with the public key. It says invalid public key. Please fix this.

I also wish it has options to change my private and public key pair.

## Frequently asked questions about Sudo Encrypt

### What is Sudo Encrypt used for?

Sudo Encrypt is used to generate RSA keypairs, encrypt messages using public keys, decrypt messages with private keys, and sign/verify message signatures. It offers seamless integration with iMessage for easy sharing of encrypted content.

### How does Sudo Encrypt work with iMessage?

Sudo Encrypt features an iMessage extension that allows you to encrypt messages directly within the iMessage app. The encrypted message is embedded as an iMessage object, which the recipient can click to decrypt.

### Is Sudo Encrypt free to use?

Yes, Sudo Encrypt is available for free. It does not require any payment to download or use its core encryption and decryption features.

### What devices does Sudo Encrypt support?

Sudo Encrypt is compatible with iPhone, iPad, and iPod touch devices. It is designed to run on Apple's iOS ecosystem.

### What is the age rating for Sudo Encrypt?

Sudo Encrypt has an age rating of 4+. This indicates it is suitable for users of all ages, with no content restrictions.

### How often is Sudo Encrypt updated?

Sudo Encrypt was last updated on April 20, 2020, with version 1.1. The release date was April 11, 2020. Further update frequency is not specified.

### Does Sudo Encrypt have ads?

No, Sudo Encrypt is ad-free. Users can enjoy the encryption and decryption features without any advertisements interrupting their experience.

### What is the user sentiment for Sudo Encrypt based on ratings?

Sudo Encrypt has a high user rating of 4.7 stars from 6 ratings, suggesting a positive reception among its users for its functionality and ease of use.

## Version history (last 2 releases)

### 1.1 — 2020-04-20

- Fixed: iPad app crashed sometimes when presenting share view.

### 1.0 — 2020-04-11

No release notes.

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All apps by Shunzhe Ma: https://appshunter.io/developer/1052286218

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*