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TKeySign 1.1.0, published by Tillidis, is a command-line utility that enables users to create hardware-backed digital signatures for any file by leveraging the open-source Tillitis TKey secure USB dongle. Positioned in the Security/Cryptography category, the program off-loads the critical private-key operation to the tamper-resistant device so that the secret signing key never leaves the silicon, eliminating the risk of key leakage from the host computer and providing strong assurance of authenticity and integrity for software releases, firmware images, legal documents, e-mail attachments, or backup archives. After plugging the TKey into any Windows workstation, TKeySign detects the device, hashes the target file with BLAKE2s, prompts the user to touch the contact button to confirm intent, and returns a compact Ed25519 signature together with the corresponding public key; the resulting detached signature file can then be distributed alongside the original data so that recipients with the public key can verify its origin and unchanged state through any standard Ed25519 verifier. The lightweight binary supports batch processing of multiple files, optional time-stamping through an external RFC 3161 service, and integration into existing build or CI pipelines via simple shell redirection. Across its four released iterations the tool has added cross-platform static builds, reproducible compile flags, and UEFI secure-boot compatibility fixes, while maintaining backward compatibility with all TKey hardware revisions. TKeySign is available for free on wget.nero.com, where downloads are supplied through trusted Windows package sources such as winget, always delivering the latest version and supporting batch installation of multiple applications.
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