Aladdin SecurLogon Client for Linux by Aladdin-RD supports enhanced and strict authentication with PKI. It enables a simple and quick transition to two- and three-factor authentication in Linux. Full PKI support, compatibility with various domains, and operation in heterogeneous environments (Windows and Linux) are provided. It serves as a complete replacement for Microsoft Smart Card Logon on domestic operating systems. Aladdin SecurLogon allows configuring two-factor authentication for various scenarios, including local and network 2FA with or without PKI. It supports the use of USB tokens and smart cards JaCarta for authentication. The client is designed to enhance security for IS connections and increase overall security by transitioning from simple password systems to two-factor authentication. It also supports secure remote desktop connections using data from a protected electronic key section. The client is compatible with domestic operating systems such as Astra Linux, RED OS, and Alt. Aladdin SecurLogon is registered in the state certification system for information protection tools and complies with FSTEC Russia requirements.