# Bright Shadow — Encrypt your message with RSA

> Local RSA encryption for private messaging and secure data exchange. (iPhone/iPad app by 培远 陈.)

- Source: https://appshunter.io/ios/app/bright-shadow/id1538145082 (this page in markdown: same URL + `.md`)
- Developer: [培远 陈](https://appshunter.io/developer/1538086487)
- Category: Utilities, Social Networking
- Price: Free
- Rating: 4.67/5 from 6 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 33 MB
- Languages: English, Chinese
- Released: 2020-11-13
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/bright-shadow/id1538145082/reviews.md

## What is Bright Shadow?

Generate RSA keys locally, and ONLY store locally.

RSA Asymmetric Encryption: Different from Symmetric Encryption, has a pair of Public Key and Private Key. 
RSA Public Key: Can be published to everyone. Always used to encrypt data, as well as verify signature from Private Key.
RSA Private Key: Must keep it safe. Can decrypt data which encrypt with Public Key, and sign the data.

You'll exchange public key with your friends, and then encrypt message with their public key. And the message can only decrypt by the private key.

We won't upload any of your personal information, including RSA Keys and messages.

## Key features

- RSA asymmetric encryption
- Local key generation and storage
- Public and private key management
- Message encryption and decryption
- Enhanced privacy for communication

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/bright-shadow/id1538145082/reviews.md

### 4/5 — icon应该留底，太贴地了

*2023-08-09*

挺好的

### 5/5 — 可否提供1024的选项，是否有安卓版本

*2021-12-28, version 1.0.3*

2048的加密消息太长了，可否增加1024选项。有提供1024版本吗？我做了个一样的，发现你的加密信息比直接二进制转base64长很多。是否有安卓版本？

## Frequently asked questions about Bright Shadow

### How does Bright Shadow encrypt messages?

Bright Shadow uses RSA asymmetric encryption. This means it generates a pair of keys: a public key for encrypting messages and a private key for decrypting them. You share your public key with others, and they use it to encrypt messages sent to you, which only your private key can then decrypt.

### Is my data safe with Bright Shadow?

Yes, Bright Shadow prioritizes your data safety. All RSA keys and messages are generated and stored exclusively on your device. The app does not upload any personal information, ensuring your communications remain private.

### What devices does Bright Shadow support?

Bright Shadow is available for Apple devices, including iPhone, iPad, and iPod. It is designed to run on these iOS platforms.

### How often is Bright Shadow updated?

The latest version of Bright Shadow is 1.0.3, which was last updated on April 11, 2021. While updates may not be frequent, the app focuses on core functionality and security.

### What is the age rating for Bright Shadow?

Bright Shadow has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.

### Does Bright Shadow have ads?

No, Bright Shadow does not contain advertisements. As a free application, it provides an ad-free experience for its users.

### Can I use Bright Shadow offline?

Yes, Bright Shadow is designed to function locally on your device. You can generate keys and encrypt/decrypt messages without an internet connection, making it useful in various situations.

### What makes RSA encryption different from symmetric encryption?

RSA is an asymmetric encryption method, using separate public and private keys. Symmetric encryption, in contrast, uses a single key for both encryption and decryption. Asymmetric encryption is beneficial for secure key exchange and digital signatures.

## Version history (last 4 releases)

### 1.0.3 — 2021-04-11

- Fix freeze when trying to paste in text box

### 1.0.2 — 2020-11-30

1. Support scan QR code from image
2. Export/Import your RSA key pair if you want

### 1.0.1 — 2020-11-15

Fix some problem when got broken public key

### 1.0 — 2020-11-13

No release notes.

## Apps similar to Bright Shadow

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [超级配音-促销叫卖录音、配音神器](https://appshunter.io/ios/app/id1508332307) | — | Free | Utilities |
| [SimpleNet](https://appshunter.io/ios/app/simplenet/id1624442074) | 5.0 (2) | Free | Utilities |
| [Kosh - Invisible Storage](https://appshunter.io/ios/app/kosh-invisible-storage/id1529707748) | 5.0 (1) | Free | Utilities |
| [Stage1st Reader](https://appshunter.io/ios/app/stage1st-reader/id509916119) | 4.9 (11) | Free | Utilities |
| [小鱼短信](https://appshunter.io/ios/app/id1515035333) | 4.8 (31) | Free | Utilities |
| [Tracker Config](https://appshunter.io/ios/app/tracker-config/id1525835558) | — | Free | Utilities |

## More apps by 培远 陈

- [DevTools - Programming](https://appshunter.io/ios/app/devtools-programming/id1572666937)
- [爱老助手](https://appshunter.io/ios/app/id1638156311)

All apps by 培远 陈: https://appshunter.io/developer/1538086487

---

*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 2026-06-10.*