Reprogrammable OTP tokens – a new innovation in 2FA

Protectimus SLIM mini is a new generation of reprogrammable TOTP hardware tokens. They can be used in 2FA systems based on OATH standards, and easily reflashed using an application installed on your NFC-capable Android smartphone. It allows the user to determine the OTP’s expires (30 or 60 seconds), and also set up a secret key.

A key feature of Protectimus SLIM mini NFC security token is the ability to configure it with any secret key that user needs. Using this token allows you to completely eliminate the risk of the provider of two-factor authentication compromising the secret key, and allows you to connect users who do not want or cannot use their cell phones as OTP tokens to your two-factor authentication system.

Google Authenticator and YubiKey alternative

Contactless hardware OTP-token Protectimus SLIM mini is suitable for any 2FA system based on Google Authenticator. It can be used both in the corporate sector, as well as for the protection of personal accounts on popular sites such as Google, Facebook, VKontakte, Dropbox, GitHub, etc.

Cross-platform effectiveness

Protectimus SLIM mini is a good alternative to SMS and software tokens, because it is the safest OTP generator. Hardware OTP tokens are not connected to any network, so the one-time passwords are protected from interception or viruses on your smartphone.

Attractive design

Protectimus SLIM mini tokens are produced in a form of elegant smart cards sized 64 x 38 x 1 mm. Such cards won’t take up much space in your wallet and will assure reliable protection from hacking of your account. When ordering 1000 pieces or more, the tokens can be produced in your corporate style.


  • The ability to flash a secret key using a smartphone (Android OS, NFC support) from 1 pc.
  • Choice of OTP expiration time – 30/60 seconds from 1 pc.
  • Use of TOTP algorithm.
  • Compliance with OATH standards.
  • Suitability for strong authentication systems based on the Google Authenticator.
  • Dimensions: 64 x 38 x 1 mm.
  • Possibility of branding for orders of 1000 pieces.


Protectimus SLIM (English)

How to buy?

You can easily become a happy owner of this device. Depending on your preference, we can place your company’s logo and other visual features on the device; you can also choose the color of your token. Producing customized tokens based on your specific requirements takes additional 3-4 weeks.

The price of tokens does not include shipping and delivery costs and other additional charges, such as taxes and customs duties.

Delivery times depend on several factors, in particular: lot/consignment size, token availability at our warehouse, and postal service. Besides, the delivery time will depend on whether additional visual features need to be placed on the products. Typically, if there is a sufficient quantity of products at the warehouse, orders are delivered within 2 to 6 weeks.

To place an order, please fill out the form, and our specialist will promptly contact you.

See Also

ImageToken ModelPrice, pcs
Brief DescriptionDescription
PROTECTIMUS TWOPROTECTIMUS TWO$11.99$11.49$10.99$9.99$8.99

$3 when paying service in advance for a year
Bulletproof OTP token: reliable, waterproof, stylishBulletproof TOTP token: reliable, waterproof, stylish

$3 when paying service in advance for a year
PROTECTIMUS FLEXPROTECTIMUS FLEX$19.99$18.99$16.99$15.99$13.99The reprogrammable and stylish hardware TOTP tokenThe reprogrammable hardware TOTP token
PROTECTIMUS SLIM MINIPROTECTIMUS SLIM NFC$29.99$28.99$26.99$24.99$21.99Reprogrammable NFC token, that fits any two-factor authentication systemReprogrammable NFC token
PROTECTIMUS SMARTPROTECTIMUS SMARTfreeAvailable for all key Android and iPhone platformsSoftware token for Android and iPhones
PROTECTIMUS BOTPROTECTIMUS BOTfreeOTP delivery via messenger — easy, secure, convenient. The service is available on Telegram, Viber and Facebook Messenger.The service is available on Telegram, Viber and Facebook Messenger
PROTECTIMUS SMSPROTECTIMUS SMS$2 per user/monthMinimum hassleMinimum hassle

Knowledge base

One-time passwords are generated by a special algorithm (TOTP, HOTP, OCRA) using a secret key. Conventional OTP tokens’ secrets are configured during production, and cannot be changed. For example, in 2FA solutions based on Google Authenticator, secret keys are generated by the server, and connecting a hardware token with a preinstalled secret key is impossible. But reprogrammable NFC tokens can be set up uniquely to each 2FA system as such OTP token can be set up to use a secret key generated by the authentication system, and reflashed every time it is reassigned to another person.

Protectimus SLIM mini NFC tokens can be used by anyone who wants to protect their account in Google, Facebook, Vkontakte, Dropbox, GitHub, Kickstarter, KeePass, Microsoft, Teamviewer, etc. The 2FA systems of these and other popular platforms are built on the basis of Google Auth, and require users to install the app from Google or receive one-time passwords by SMS. But hardware OTP tokens are more reliable. They nullify the risk of interception of the one-time password.

SMS messages are one of the most convenient and widely used ways to deliver one-time passwords. But they are not the safest. During transmission, SMS messages can be intercepted by means of a “man in the middle” attack or a virus on the user’s smartphone. In addition, SMS-center employees may have access to these messages. Hardware OTP tokens operate completely autonomously without requiring a connection to a network, which means they are protected against such threats. Thus reflash tokens are a safer alternative to SMS-authentication.

Software tokens were invented with the advent of smartphones as a convenient alternative to hardware OTP tokens. Functionally identical to hardware tokens, and sometimes even more convenient, because a single application lets you create multiple OTP tokens for different resources. But from the point of view of security it is better to buy a TOTP hardware token, since with the increasing popularity of smartphones, the number of viruses designed specifically to compromise the software OTP generators or intercept SMS-messages with one-time passwords has increased as well. With the hardware tokens there is no such risk.

A miniature, reprogrammable NFC token smart-card as small as 64 x 38 x 1 mm is a new innovation in two-factor authentication. This OTP token looks stylish, takes up little space in your wallet, and is waterproof and robust. Protectimus Slim mini tokens are built to last up to 3-5 years, with a warranty of 12 months. The world has long been waiting for such a solution to strengthen two-factor authentication systems built on the basis of Google Authenticator. And finally with the advent of NFC technology it has become possible.

To transfer NFC security tokens to your 2-factor authentication system, the tokens must be pre-programmed. To do this, we provide a special application for smartphones based on the Android operating system. Please note that your phone must support NFC technology. Detailed instructions on the use of this application is available on our website.

Difference between normal and reprogrammable OTP tokens

What services can be used with Protectimus SLIM mini?

Why use hardware tokens instead of SMS authentication?

Software OTP tokens vs. hardware OTP tokens

The smart card token – a convenient and functional device

How to reprogram my Protectimus SLIM mini?