The SecureToken-337F electronic key is two devices in one case: the Secure Token-337 electronic key and the FLASH memory with logical disks for storing any user data. “SecureToken-337F” is fully compatible with the “SecureToken-337” electronic key; it is used for secure storage and use of electronic digital signature keys (EDS) of the tax service of Ukraine, keys of ACSK of state and other organizations, in banking and corporate systems, Internet banking and etc. It performs the functions of the formation and verification of a digital signature, encryption, authentication, storage of secret (key) information. SecureToken-337F can be used to store any user data with protection against unauthorized access. It supports two types of disk arrays - open and protected, with a total capacity of up to 32 GB. All data on a secure medium is stored in an encrypted form. Key storage and cryptographic operations are implemented in the NXP Semiconductors P5CC037 smart chip, which is used in SecureToken-337. SecureToken-337F supports the following operating systems: Windows XP/2003/2008/Vista/7/8/10, Linux, Mac OS, Android. The SecureToken-337F electronic key is supplied with the CryptoFlash software.