Many digital signing solutions face security threats like man-in-the-middle (MiTM) attacks due to complex or vulnerable web-based platforms. This paper proposes a novel Identity-based Digital document signatures (iDSign) framework, a secure and lightweight solution for digital document signing that overcomes these traditional limitations. iDSign features a secure communication protocol with lightweight mutual authentication inspired by the Lightweight Identity-based Transport Layer Security (iTLS) protocol, which uses Identity-Based Cryptography (IBC) to eliminate heavy certificate exchanges and thus reduce computational overhead. The framework integrates the Hess Identity-based Signature (IBS) scheme for robust digital signatures and employs tamper-resistant Secure Elements (SE) within devices to protect cryptographic credentials and operations. iDSign is adaptable for both in-person and remote use and supports various interfaces like NFC, Bluetooth, and Transmission Control Protocol/Internet Protocol (TCP/IP) across devices with SEs. The paper includes a comprehensive security analysis to illustrate the framework’s robustness against popular attacks, as well as a performance analysis that compares iDSign with current solutions to confirm its effectiveness. The scope of this work covers various signing scenarios, focusing on how to develop a secure, efficient, and flexible digital signature framework that addresses the limitations of traditional solutions, particularly in resource-constrained environments. This paper establishes the theoretical foundation for the versatile iDSign framework, showcasing its potential for enhancing secure digital document signing.