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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesSecureGen is an open-source, do-it-yourself hardware project that combines TOTP and HOTP codes, a locally stored password vault, and password entry over Bluetooth. It is not a ready-to-use app or a verified preassembled device: you build and flash it onto supported ESP32 display hardware. The project’s creator describes the motivation as wanting “a physical 2FA device that I could trust completely”; that is a stated goal, not independent evidence of security.
What SecureGen does
SecureGen is designed to put authenticator codes and saved passwords on a small ESP32 device. Its project page, published by makepkg on Hackster on February 11, 2026, describes three main functions:
- TOTP: Generates time-based one-time passwords. The author says it is compatible with common authenticator services and RFC 6238 services.
- HOTP: Generates counter-based one-time passwords, advancing the counter when the user requests another code.
- Password Manager Mode: Stores passwords locally in encrypted form and can send them to another device as keystrokes over Bluetooth Low Energy (BLE) HID.
The project describes QR-based setup for authenticator entries, along with BLE and USB HID features in its repository. Compatibility claims come from the project author; the reviewed material does not establish independent compatibility testing. Hackster project page · SecureGen source repository
How TOTP works when the device is offline
TOTP codes depend on the current time. SecureGen’s project page says the device first synchronizes time over Wi-Fi using NTP, then can generate codes offline. For a build intended to keep accurate time without network synchronization, the author lists an optional DS3231 real-time clock module. The page states that this module has ±2 ppm accuracy; that is the project page’s specification, not an independent measurement.
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HOTP works differently: it uses a counter rather than a clock, and SecureGen advances that counter when the user asks for a new code. If the counter gets out of sync with the service, the project’s source instructions and the service’s recovery process matter; the reviewed descriptions do not spell out a universal recovery procedure.
Parts needed to build SecureGen
The project is a build-your-own device, not a finished product. The Hackster page names a LILYGO TTGO T-Display, while its build instructions specify a LILYGO T-Display ESP32 and USB-C cable. The GitHub repository also lists the T-Display-S3 as supported. Check the current repository instructions and select the correct board variant before flashing, since firmware and steps can differ by hardware.
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| Part | Role | Required? |
|---|---|---|
| LILYGO T-Display ESP32 development board | Core ESP32 display hardware for the build; the project page describes its display as a 1.14-inch, 135×240-pixel color TFT. | Yes, for the described T-Display ESP32 build. |
| USB-C cable | Used to connect the board for the build and flashing process. | Listed in the project’s “Try It Yourself” instructions. |
| DS3231 RTC module | Provides a real-time clock for offline timekeeping. | Optional; listed for offline TOTP timekeeping. |
| 3.7V LiPo battery with JST connector | Optional battery power. | Optional; verify connector and board compatibility before buying. |
The parts list identifies components, not a verified retail bundle: no current price, stock status, exact product listing, or finished SecureGen device sale is established by the project sources. The board is a development board for building the project, not a complete authenticator on its own.
What the project claims about security—and what remains unverified
The author says vault data is encrypted with AES-256-GCM and describes deriving a key from the PIN using PBKDF2-HMAC-SHA256 with 25,000 iterations. The project page itself says that iteration count is below OWASP 2023 recommendations because of ESP32 hardware constraints. It also says a hardware secure enclave is not present by default. Those qualifications matter: naming AES-256 alone does not establish that the whole device or its stored secrets are secure.
Rank #3
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For password entry, the author describes a device-side PIN check before BLE transmission, Wi-Fi disabled during password transmission, and BLE Secure Connections pairing. The page also describes an application-level encrypted web-management channel and an architecture with eight security-design layers. These are implementation descriptions by the project author, not results of an independent audit or comparative security test. The reviewed sources do not establish a completed third-party security review.
The author writes, “Security through obscurity is not security. Security through architecture is,” and invites readers to inspect the open-source code. Public code can make inspection possible, but the invitation is not evidence that an audit has occurred or that every build matches the published source.
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Is SecureGen a good fit for you?
SecureGen is most relevant to someone who wants to build and inspect a dedicated hardware authenticator and password-entry device, and is comfortable following board-specific flashing instructions and maintaining a DIY device. It combines visible TOTP/HOTP codes with a local password vault and BLE keyboard-style entry, which differs from both software authenticator apps and commercial hardware security keys.
Before choosing it, weigh the practical differences:
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- Setup: SecureGen requires compatible hardware, firmware flashing, and maintenance; a software app is typically ready to install, while a commercial security key is generally a prebuilt product.
- Authentication flow: SecureGen displays TOTP/HOTP codes. A hardware security key instead handles supported authentication flows and is not simply a screen for showing time-based codes.
- Password use: SecureGen describes local vault storage and BLE keyboard entry; that is a distinct capability to evaluate against how you currently enter and protect passwords.
- Time and connectivity: TOTP needs correct time. The described setup uses initial Wi-Fi time synchronization, with an optional RTC for offline timekeeping.
- Security evidence: The project publishes design claims and source code, but the reviewed sources do not show an independent security audit.
- Maintenance and parts: A DIY build depends on compatible hardware, current firmware instructions, and your ability to troubleshoot or rebuild it; finished products reduce that assembly burden but differ in features and trust assumptions.
These are decision criteria, not proof that one category is categorically safer. The right choice depends on whether you prioritize a ready-to-use experience, code display, local password entry, inspectable source, or an independently reviewed product.
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