Secure smart card for QES, authentication, and protected key storage
CYBKEY U45C is an electronic signature card in a smart card form factor, designed for creating, storing, and using qualified electronic signature keys. The solution is suitable for businesses, government institutions, local authorities, and organizations that work with electronic document management and require stronger access protection.
Unlike a standard file-based key, the private key is generated and stored inside the protected environment of the card. It is not exported, copied to the computer, or transmitted in an open form during user operations.
This makes CYBKEY U45C a practical solution for organizations that want to reduce the risk of key compromise, organize the use of QES, and improve control over employees’ digital signatures.
Why organizations use smart cards for electronic signatures
For many years, electronic keys were often stored as files on a computer or external drive. This approach is still common, but it has obvious risks: the key can be copied, lost, or compromised if the workstation is infected with malware.
A smart card works differently. Cryptographic operations are performed directly on the card, while the private key remains inside the protected device. For the user, the process is simple: the card is used for signing documents or authentication. From a security perspective, this is much safer than storing a key as a file.
Key capabilities of CYBKEY U45C
- generation and secure storage of electronic signature keys;
- creation of qualified electronic signatures under the card owner’s control;
- private keys cannot be exported from the device;
- user authentication with a PIN code;
- unlocking mechanism using a PUK code;
- protection of data exchanged between the card and terminal;
- support for contact and contactless interfaces;
- use for electronic signatures, authentication, and access protection.
Where CYBKEY U45C is used
In practice, an electronic signature card can perform several roles at the same time.
For an accountant, it is a protected QES carrier for working with reports and electronic documents. For an employee of a public institution, it is a tool for electronic identification and signing official documents. For an enterprise, it can become part of a corporate access management and digital certificate system.
CYBKEY U45C can be used in the following areas:
- government institutions and local authorities;
- financial organizations;
- healthcare institutions;
- educational institutions;
- critical infrastructure enterprises;
- companies with active electronic document management;
- organizations implementing MFA, PKI, or Zero Trust approaches.
CYBKEY U45C card or CYBKEY U45T token
The CYBKEY product line can include both smart cards and USB tokens for working with qualified electronic signatures.
CYBKEY U45C is a good choice for organizations that already use card-based access systems, corporate PKI solutions, or want to combine electronic signature, authentication, and user identification in one form factor.
If the main priority is simple connection to a computer without a card reader, it is worth considering the CYBKEY U45T electronic signature token. Both devices are designed for secure key storage and QES operations. The choice depends on the organization’s infrastructure and usage scenario.
Key advantages
| Capability | What it gives the organization |
|---|---|
| Key generation on the card | The private key is not created on the computer and does not leave the protected environment. |
| PIN and PUK | Access to electronic signature operations remains under user control. |
| Protected exchange with the terminal | Reduces the risk of data interception or substitution during use. |
| Smart card form factor | Convenient for integration with card-based access and identification systems. |
| QES support | The card can be used for signing electronic documents. |
Technical features
CYBKEY U45C is built on the JCOP 4.5 platform and includes an electronic signature application. The card supports the device lifecycle, personalization, activation, use, and termination of the electronic signature application.
The solution supports:
- secure storage of owner data;
- generation of electronic signature keys;
- creation of electronic signatures after user authentication;
- PIN change and unblocking;
- cryptographic operations without exporting the private key outside the card;
- work with electronic signature certificates;
- protected communication between the card and terminal.
Security of use
CYBKEY U45C supports separate administrator and signatory roles. The administrator is responsible for preparing and managing the electronic signature application, while the signatory uses the card to create electronic signatures after authentication.
This approach is important for organizations that need not only to issue QES carriers, but also to control the full key lifecycle: from initialization and generation to blocking or termination of use.
Benefits for businesses and government institutions
Implementing CYBKEY U45C electronic signature cards helps organizations move from scattered use of electronic keys to a managed digital identity system.
- reduced risk of private key copying or loss;
- stronger control over QES usage;
- convenient management of certificates and carriers;
- integration with corporate access systems;
- improved protection of electronic document management;
- alignment with modern information security requirements.
Who should consider CYBKEY U45C
The CYBKEY U45C electronic signature card is suitable for organizations that already use QES in daily operations but want stronger key protection and better control over how signatures are used.
It is especially relevant when a company or institution has many signatories, requires access separation, uses internal information systems, or is implementing multi-factor authentication.
Need advice on CYBKEY U45C electronic signature cards?
Smart Lab helps businesses and government institutions implement solutions for qualified electronic signatures, secure key storage, multi-factor authentication, and electronic document management.
Our specialists will help you choose the right carrier format, assess compatibility with your infrastructure, and prepare a secure solution for working with electronic signatures.
FAQ
What is the CYBKEY U45C electronic signature card?
It is a secure smart card for creating, storing, and using qualified electronic signature keys.
How is an electronic signature card different from a file-based key?
A file-based key can be stored on a computer or external drive. With CYBKEY U45C, the private key is stored inside the card and cannot be exported.
How is CYBKEY U45C different from the CYBKEY U45T token?
The main difference is the form factor. CYBKEY U45C is a smart card, while CYBKEY U45T is a USB token. Both solutions can be used for secure storage of electronic signature keys.
Can the private key be copied from the card?
No. The private key is generated and stored inside the protected environment of the card and cannot be exported.
What organizations is CYBKEY U45C suitable for?
It is suitable for government institutions, local authorities, financial organizations, healthcare institutions, critical infrastructure enterprises, and companies actively using electronic document management.
Can the card be used for multi-factor authentication?
Yes. CYBKEY U45C can be part of a multi-factor authentication and access control system for corporate or government information systems.