# E-num

> Secure mobile authentication system using challenge-response and on-device key storage. (iPhone/iPad app by VEBMANI.RU, OOO.)

- Source: https://appshunter.io/ios/app/e-num/id302894184 (this page in markdown: same URL + `.md`)
- Developer: [VEBMANI.RU, OOO](https://appshunter.io/developer/302894187)
- Category: Productivity, Utilities
- Price: Free
- Rating: 4.10/5 from 8 App Store ratings · 54 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 11 MB
- Languages: American English, Russian
- Released: 2009-02-21
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/e-num/id302894184/reviews.md

## What is E?

1. About E-num
--------------
E-num is an up-to-date system of authentication providing high-level security. Security is based on both cryptographic tools and architectural level. A secret access key is stored not on your computer but on your mobile phone. Thus, you can use it to work on different computers. Moreover, your key cannot be damaged or modified by Trojan Hourses and other harmful programs.

2. Authorization process 
---------------------
E-num is easy to use: there is no need to memorize complicated passwords. The authorization process is based on the challenge-response model.

Authorization process by using E-NUM is very simple: on the authorization page the user enters his email and received a Challenge Value.
Users launches the E-num application on the mobile phone and enters the Challenge Value. After that a number-answer will be shown on the phone display.
User enters the number-answer in the authorization field on the website and gets access to secured sections.

3. Advantages
------------
The key advantage of E-NUM if compared with its analogs is efficiency and economy for both suppliers and consumers. 
No additional authorizing server is required to implement the E-NUM authorization system on a website of an Internet store, in banking or corporate systems, because all necessary information is stored in the E-NUM database. Data exchange is performed by using E-num interfaces provided by the system via the secure https protocol. Clients use their (Java compatible) mobile phones to get authorized at websites integrated with E-NUM.
Users do not need any kind of expensive devices. A unique cipherpad is embedded in the Java application designed for mobile phones.

## Key features

- High-level security authentication
- On-device secret access key storage
- Passwordless authorization
- Challenge-response model
- Protection against malware
- No additional authorizing server required

## Recent user reviews (10 of 54)

All indexed reviews: https://appshunter.io/ios/app/e-num/id302894184/reviews.md

### 2/5 — Long and inconvenient

*2017-03-05*

I understand that this app is made for security but I need to make really tons of some steps before I could just open my wallet..

### 1/5 — Изменили процедуру входа

*2015-11-11*

В последней версии они принудительно отказались от паролей, заменив их на sms аутентификацию, при этом приложение разлогинилось и заново требует активацию. Как ее пройти без понятия, куда уходит SMS подтверждение тоже. Пора полностью отказываться от уебищных сервисов вебмани, тем более, что годные альтернативы существуют. У вебмани сервис не для людей, пускай сами им и пользуются.

### 1/5 — Неверный PIN

*2015-11-04*

После обновления не могу зайти в приложение, не подходит PIN код.

### 1/5 — This version Doesn't work at all!

*2015-11-04*

Too buggy

### 5/5 — flash

*2014-06-22, version 3.1.1*

please add option to disable flashlight. When pointing on lcd monitor it blinks and cannot read qr code

### 5/5 — Nise

*2014-03-20*

Very nice application 5+++++++

### 5/5 — :)

*2014-03-17*

Хорошое приложение, стильный дизайн, отличная защита.

### 4/5 — Good

*2014-03-02*

Действительно отличное приложение. Автор спс.

### 4/5 — Wow

*2014-03-01*

The best application that i have ever had! Good work

### 4/5 — оченьудобно

*2014-02-21*

В програме совмещена безопасность кошельков и простота в использовании.
Спасибо автору.

## Frequently asked questions about E

### What is E-num and how does it work?

E-num is a security system that provides high-level authentication. It works by storing your secret access key on your mobile phone, eliminating the need for complex passwords. The authorization process involves entering your email on a website to receive a challenge value, which you then input into the E-num app on your phone. The app generates a number-answer that you use to gain access.

### What are the main advantages of using E-num?

The key advantages of E-num include its efficiency and economy. It doesn't require an additional authorizing server, as all necessary information is stored in the E-num database. Your secret access key is stored on your mobile phone, making it safe from Trojan horses and other harmful programs, and you don't need to memorize complicated passwords.

### Is E-num free to use?

Based on the provided information, E-num is offered as a free application. There are no mentions of subscription fees, in-app purchases, or advertisements, suggesting it is a free service for users.

### What kind of mobile phones are compatible with E-num?

E-num is designed to work with Java-compatible mobile phones. The application includes an embedded unique cipherpad for mobile phones, allowing users to get authorized at websites integrated with the E-NUM system.

### How does E-num enhance security compared to traditional passwords?

E-num enhances security by storing your secret access key on your mobile phone rather than on your computer, which is vulnerable to malware. The challenge-response authorization model also adds a layer of security, and the key cannot be damaged or modified by harmful programs, providing a more robust protection than simple password systems.

## Version history (last 5 releases)

### 3.7.1 — 2023-08-28

qr code scanner activation from push notification improvement

### 3.7.0 — 2023-04-28

Added the ability to show the answer number in the notification (Settings / Notifications)
Do not ask for confirmation at startup if you have recently unlocked the device with biometrics
UI improvements
Other fixes

### 3.6.10 — 2023-03-08

bugs fixes

### 3.6.9 — 2023-02-24

bugs fixes

### 3.6.8 — 2022-02-03

bug fixes

## Apps similar to E

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Singularity To Do List, Tasks](https://appshunter.io/ios/app/singularity-to-do-list-tasks/id1477784588) | 4.8 (62) | Free | Productivity |
| [На связи +](https://appshunter.io/ios/app/plus/id1668996446) | 4.5 (2,207) | Free | Productivity |
| [VPN Russia: Just Russian VPN](https://appshunter.io/ios/app/vpn-russia-just-russian-vpn/id6449165591) | 4.6 (233) | Free | Productivity |
| [VK Mail: secure email client](https://appshunter.io/ios/app/vk-mail-secure-email-client/id1563419339) | 4.6 (852) | Free | Productivity |
| [Норка: ВПН Россия / VPN Russia](https://appshunter.io/ios/app/vpn-russia/id6444030286) | 4.4 (550) | Free | Productivity |
| [Яндекс Диск - Облако для фото](https://appshunter.io/ios/app/id553266487) | 4.7 (4,697) | Free | Productivity |

## More apps by VEBMANI.RU, OOO

- [WebMoney Keeper](https://appshunter.io/ios/app/webmoney-keeper/id524382727)
- [DigiSeller](https://appshunter.io/ios/app/digiseller/id965775353)
- [E-num Auth](https://appshunter.io/ios/app/e-num-auth/id6503298323)
- [WebMoney Check-In](https://appshunter.io/ios/app/webmoney-check-in/id6749303294)

All apps by VEBMANI.RU, OOO: https://appshunter.io/developer/302894187

---

*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.*