# E-num Auth > Secure mobile authentication system using challenge-response model. (iPhone/iPad app by VEBMANI.RU, OOO.) - Source: https://appshunter.io/ios/app/e-num-auth/id6503298323 (this page in markdown: same URL + `.md`) - Developer: [VEBMANI.RU, OOO](https://appshunter.io/developer/302894187) - Category: Utilities, Productivity - Price: Free - Age rating: 4+ - Requires: iOS 13.0 · 38 MB - Languages: American English, Russian - Released: 2025-11-03 - Data updated: 2026-08-18 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/e-num-auth/id6503298323/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 - Secret access key stored on mobile - Challenge-response authorization - No complex passwords needed - Malware protection for access key - Efficient and economical system ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/e-num-auth/id6503298323/reviews.md ### 5/5 — Класс!!! *2025-11-12* Отличное приложение!!! ## Frequently asked questions about E ### What is E-num Auth? E-num Auth is a mobile application that provides a high-level security authentication system. It utilizes a challenge-response model, storing your secret access key on your mobile phone for enhanced security and convenience. ### How does the E-num Auth authorization process work? When prompted on a website, you enter your email to receive a Challenge Value. You then input this value into the E-num Auth app on your phone, which generates a number-answer. Entering this number-answer on the website grants you access. ### Is E-num Auth secure against malware? Yes, E-num Auth is designed to protect your secret access key from Trojan Horses and other harmful programs. By storing the key on your mobile phone, it is isolated from potential threats on your computer. ### Does E-num Auth require memorizing complex passwords? No, a key advantage of E-num Auth is that it eliminates the need to memorize complicated passwords. The authorization process is simplified through the challenge-response mechanism. ### What devices are compatible with E-num Auth? E-num Auth is compatible with Java-compatible mobile phones. The app is available for iPhone, iPad, and iPod devices. ### Is E-num Auth free to use? Yes, E-num Auth is available for free. There are no costs associated with downloading or using the application for authentication purposes. ### How often is E-num Auth updated? The latest version of E-num Auth is 1.1.2, and it was last updated on April 7, 2026. This indicates a commitment to maintaining and improving the application. ### Does E-num Auth have ads? No, E-num Auth does not contain advertisements. The application is designed to provide a seamless and uninterrupted user experience. ## Version history (last 4 releases) ### 1.1.2 — 2026-04-07 Fixed a bug from the previous release that incorrectly generated the response number. ### Minor UI improvements and bug fixes — 2026-03-23 Minor UI improvements and bug fixes ### 1.1.0 — 2025-11-10 Improved registration stability Added codebook verification for enhanced security ### 1.0 — 2025-11-03 No release notes. ## Apps similar to E | App | Rating | Price | Category | | --- | --- | --- | --- | | [Super Proxy - Tunnel your apps](https://appshunter.io/ios/app/super-proxy-tunnel-your-apps/id6478274781) | 4.1 (262) | Free | Utilities | | [AmneziaVPN](https://appshunter.io/ios/app/amneziavpn/id1600529900) | 3.7 (514) | Free | Utilities | | [Red Shield VPN](https://appshunter.io/ios/app/red-shield-vpn/id1476245357) | 4.8 (2,187) | Free | Utilities | | [AmneziaWG](https://appshunter.io/ios/app/amneziawg/id6478942365) | 4.2 (78) | Free | Utilities | | [DefaultVPN](https://appshunter.io/ios/app/defaultvpn/id6744725017) | 4.1 (34) | Free | Utilities | | [Netcraze](https://appshunter.io/ios/app/netcraze/id6738113127) | 4.5 (289) | Free | Utilities | ## More apps by VEBMANI.RU, OOO - [E-num](https://appshunter.io/ios/app/e-num/id302894184) - [WebMoney Keeper](https://appshunter.io/ios/app/webmoney-keeper/id524382727) - [DigiSeller](https://appshunter.io/ios/app/digiseller/id965775353) - [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 2026-08-18.*