Information stands nowadays as one of the major global resources. As emphasized alongside the current Covid19 crisis, our society relies on an ever-increasing need to process and communicate data, with important repercussions in politics, healthcare, innovation, everyday life, and global economy. A high-level reliance on the transmission of sensitive information over the Internet by individuals, banks, governments, and key industries, has been reached thanks to the improvement of public-key cipher methods. Further improving security in the streaming of sensitive data still stands as a major issue for a variety of typical use-cases, for which secret-key cipher methods are provably-secure and can be enabled in the real-world by quantum-safe solutions. In this regard, the field of photonic quantum information aims at exploiting quantum states of light to achieve communication and computational tasks that are not classically feasible. For example, quantum key distribution (QKD) enables to establish secret keys between distant parties with unconditional security. One of today’s strong driving routes lies in the implementation of quantum systems for real-world applications and use-cases, with high societal and economic impacts. In this framework, the use of high-dimensional entangled states has recently attracted much attention as they enable the possibility of encoding large amounts of information on paired photons answering today’s challenge of fibre quantum communication in terms of data capacity, robustness, as well true securing. On the other hand, quantum integrated photonics has now reached a level of maturity allowing the development of practical, flexible, compact, and scalable solutions, holding the promise of technological breakthroughs in quantum information technology. In this context, SPHIFA’s consortium aims at being a lead contributor to this effort, namely by addressing the design and realization of new generation photonic quantum systems allowing to create, manipulate, and detect high-dimension photonic quantum states – qudits and clusters - encoded in the frequency domain. SPHIFA will tackle this hot topic by marrying quantum and integrated optics devoted to multimode entanglement-based quantum communication demonstrators that are fully exploitable, autonomous, and flexible. The ambition is to answer the quest to out-of-the-laboratory realizations by providing novel and strategic concepts and technological routes. This endeavour casts the scope of future functional quantum networks by reinforcing quantum communication technologies and protocols. The results demonstrated in this project are therefore expected to have major impacts at the international level in quantum information technologies. Strategically, we note that SPHIFA aims at promoting a collaborative research program in the field of quantum communications, based on complementary partners, to permit France to be highly competitive at the international level and in a leading position in Europe for both technology and application-oriented quantum communication systems. Repercussions of this ambitious research program will be both scientific and societal, notably in terms of improved data exchange security.