# StockTreasury PrimeSigner — Powerful digital signatures

> Secure two-factor authentication for capital stock record access. (iPhone/iPad app by HAR-LEX, L.L.C..)

- Source: https://appshunter.io/ios/app/stocktreasury-primesigner/id1510631112 (this page in markdown: same URL + `.md`)
- Developer: [HAR-LEX, L.L.C.](https://appshunter.io/developer/1458486368)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 10.0 · 56 MB
- Languages: English
- Released: 2020-05-01
- Data updated: 2026-07-22
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/stocktreasury-primesigner/id1510631112/reviews.md

## What is StockTreasury PrimeSigner?

PrimeSigner is a proprietary two-factor authentication app that works with StockTreasury to provide safe and secure access to capital stock records anytime, anywhere. All logins and ledger transactions are secured with public-key cryptography based digital signatures. This guarantees non-repudiation of all important user actions.

• Authentication based on biometrics
• Public-key cryptography based on elliptic-curve cryptography
• Private keys are stored in the most secure way allowed by the user’s device (Titan M, Secure Enclave, or TrustZone)

StockTreasury is the command center for stock ledger management. It offers complete control over transactions and associated communications. StockTreasury sets a new benchmark - it guarantees absolute accuracy and unchangeability of ownership records.

Take your digital record-keeping to a new level of control and speed. Enjoy the benefits of direct stock management. The issue, receive, transfer and monitor shares online. 24/7/365. It combines the traditional and robust database architecture with a cutting edge, quantum-proof KSI® blockchain technology.

▸ Easy to use
Secure login. Seamless share transfers. Quantum-proof digital signature.

▸ Single source of truth for the relying parties
Each and every stock transaction is secured by quantum-proof KSI® blockchain.

▸ Seamless share transfer
Easy to understand interface.

StockTreasury together with PrimeSigner is a fully digital stock ledger, compliant with Delaware laws and regulations. StockTreasury is a revolution through evolution that combines the past, present and future. The past: reliable cryptography that has stood the test of time. The present: the opportunities that the internet has provided through direct peer-to-peer communication. The future? The next generation KSI® blockchain, quantum-proof to protect your shares.

StockTreasury user access is granted through a mobile app called PrimeSigner. PrimeSigner has been built to meet the high-security standards set for StockTreasury. PrimeSigner authenticates StockTreasury users via biometrics with data stored securely on their mobile device.

Find Us on Web
• Official website: http://stocktreasury.com/
• Follow us on Twitter: https://twitter.com/StockTreasury
• Like us on Facebook: https://www.facebook.com/StockTreasury

Device compatibility notice:
The app uses fingerprint recognition or face recognition. 

For additional questions, compatibility regards and service-related questions please write get into us via support@stocktreasury.com.

## Key features

- Two-factor authentication
- Biometric login
- Public-key cryptography
- Secure private key storage
- Digital signatures
- Quantum-proof blockchain technology

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/stocktreasury-primesigner/id1510631112/reviews.md

### 1/5 — Web site is no longer reachable. Stock certificates may be in trouble.

*2025-09-20*

A blockchain company that has gone under? Tried reaching it from several different locations but no luck.

## Frequently asked questions about StockTreasury PrimeSigner

### What is PrimeSigner used for?

PrimeSigner is a two-factor authentication app that works with StockTreasury to provide secure access to capital stock records. It ensures safe logins and ledger transactions using digital signatures.

### How does PrimeSigner ensure security?

PrimeSigner uses public-key cryptography based on elliptic-curve cryptography and biometric authentication. Private keys are stored securely on the user's device, such as in the Secure Enclave or TrustZone.

### Is PrimeSigner free to use?

Yes, PrimeSigner is available for free. The application does not have any associated costs for download or usage.

### What devices is PrimeSigner compatible with?

PrimeSigner is compatible with iPhone and iPod devices. It utilizes fingerprint or face recognition for authentication.

### How often is PrimeSigner updated?

The latest version of PrimeSigner is 1.2.10, which was last updated on May 12, 2022. Updates ensure continued security and functionality.

### Does PrimeSigner have ads?

No, PrimeSigner does not contain advertisements. It is a completely ad-free application.

### What age rating does PrimeSigner have?

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

### Where can I get support for PrimeSigner?

For additional questions, compatibility concerns, or service-related inquiries, you can contact support via email at support@stocktreasury.com.

## Version history (last 5 releases)

### 1.2.10 — 2022-05-12

Improved application stability. Please keep the app updated to get the latest security updates and the best user experience.

### 1.2.7 — 2021-08-30

Improved developer tools and application stability

### 1.2.5 — 2021-06-17

Updated privacy policy url.

### 1.2.4 — 2021-04-09

We're always working on improvements. Please stay updated with the latest version for the best experience.

### 1.2.3 — 2021-02-04

We're always working on improvements. Please stay updated with the latest version for the best experience.

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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 2026-07-22.*