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HORIZON EUROPE TOPIC · Cluster 3 · Civil Security for Society

Secure PQC implementations, Cryptanalysis and Post-quantum Digital Trust

HORIZON-CL3-2027-02-CS-ECCC-03 — the expected outcomes as checkable statements, what evaluators look for in this topic, and the conditions that shape the proposal.

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ForthcomingRIA · lump sumDeadline 15 September 2027EUR 3 million to EUR 4 million per project

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TopicHORIZON-CL3-2027-02-CS-ECCC-03
StatusForthcoming
CallHORIZON-CL3-2027-02-CS-ECCC — Indirectly Managed Action by the ECCC (2027)
Type of actionResearch and Innovation Actions · lump sum
Opening2 March 2027
Deadline15 September 2027
BudgetEUR 3 million to EUR 4 million per project · 3 projects expected · EUR 19 million in total
Part B page limit45 pages (standard application form; check your call)
TemplateWork Programme 2026–2027 application form

Expected outcomes

Projects may contribute to some of the expected outcomes; say which ones and why. The topic says: “Proposals are expected to contribute one or more of the following:”

  1. EO1 Practical robust implementations of PQC schemes that can withstand implementation attacks including side-channel attacks, fault attacks and combined attacks, and design of automated tools for evaluating the security of PQC implementations. Comprehensive guidelines for implementing countermeasures against a wide range of attacks.
  2. EO2 Advances in understanding the quantum hardness of mathematical problem classes; new quantum algorithms and improvements in quantum programming and implementation; security validation methods; design of post-quantum schemes with improved security against quantum and AI-based attacks.
  3. EO3 Post-quantum schemes and protocols to support privacy-friendly applications and services, ncluding the secure and private use of electronic identities. Design of new digital signatures, key encapsulation mechanisms, and other schemes or use of existing ones to build new verification protocols.

What evaluators will look for in this topic

Expected outcomes

  • Projects may contribute to some of the expected outcomes; say which ones and why.
  • For each outcome (EO1 to EO3), name who will use or adopt your results (a specific group, not “industry” or “society”), how they get them, and the indicator that shows the change, with baseline, target and date.
  • Use the topic's own words for each outcome, so the evaluator can tick it off.

What the scope asks for

Evaluators check the proposal against these sentences of the scope. Answer each one visibly, in the call's own words.

  • “Furthermore, to boost confidence in PQC systems, their security should be assessed, including the potential impact of new quantum algorithms or new optimizations of existing ones, also combined with AI.”
  • “Another key research area is digital trust in the post-quantum era, which requires transforming various areas, such as secure identities, data protection, access to essential services, and applications such as backup recovery, browser extensions and others into trusted and reliable solutions, via new post-quantum schemes and advanced building blocks for privacy-enhancing protocols.”
  • “Proposals should address one of the following technology areas:.”

Conditions that shape the proposal

  • Part B, sections 1–3: 45 pages (standard application form). Text beyond the limit is not read; tables and figures count.
  • Lump sum: the budget is fixed per work package and paid when each work package is completed. Every work package needs activities and deliverables an evaluator can verify, and the effort must match the money.
  • Other Eligible Conditions: “In order to achieve the expected outcomes, and safeguard the Union’s strategic assets, interests, autonomy, and security, participation in this topic is limited to legal entities established in Member States and Associated Countries. In order to guarantee the protection of the strategic interests of the Union and its…”

Impact pathway and traps

  • Keep outputs, outcomes and impacts apart: what you deliver, what changes when others use it, and the long-term effect.
  • Link your outcomes to the destination's expected impacts in the Work Programme. Destination impacts are long-term effects, not project deliverables.
  • Name the barriers outside the project (regulation, markets, user behaviour) that could block uptake, and what you will do if they do.
  • Section 2.3 (the summary canvas) is optional on this call; the old split into scientific, economic and societal impact is no longer required.
The scope, as published

Securing PQC algorithm implementations is vital to protect against implementation attacks, such as side channel attacks, fault attacks and combinations of these, which may be amplified by deep learning. Current countermeasures incur significant overhead, and new approaches are needed to balance security and performance. Formal verification tools and methodologies can help achieve this goal and provide machine-readable evidence. Furthermore, to boost confidence in PQC systems, their security should be assessed, including the potential impact of new quantum algorithms or new optimizations of existing ones, also combined with AI. Another key research area is digital trust in the post-quantum era, which requires transforming various areas, such as secure identities, data protection, access to essential services, and applications such as backup recovery, browser extensions and others into trusted and reliable solutions, via new post-quantum schemes and advanced building blocks for privacy-enhancing protocols. Proposals should address one of the following technology areas: Development of solutions to prevent implementation attacks, balancing security, performance and cost; research in new attacks, including AI-powered ones, and/or combination of attacks, to inform secure design; creation of testing frameworks for automated security evaluations; improvement of formal verification methodologies. Quantum hardness analysis, via the study of the impact of new quantum algorithms or improvement of existing quantum algorithm implementations as well as the impact of AI-supported quantum attacks; analysis of cryptanalysis results; design of new post-quantum schemes using the information of the advances achieved/ fine-tuning of parameters sets. Design of quantum-resistant schemes and protocols supporting the field of privacy-friendly applications and services, including electronic identities, verification protocols and pseudonymous access options, protocols for attestation and anonymous attestation, for real world scenarios, via the design of new digital signature schemes and key encapsulation mechanisms, design of advanced cryptographic schemes, and usage of existing schemes in new protocols, for post-quantum digital identity and digital trust systems.

Other topics in HORIZON-CL3-2027-02-CS-ECCC

Source and attribution

Topic text from the official topic page on the EU Funding & Tenders Portal, retrieved 19 October 2026. © European Union, reused under Commission Decision 2011/833/EU (CC BY 4.0). Changes: the expected outcomes and impacts are split into numbered statements, long passages are shortened, and the evaluator checklist is GrantWise's own commentary. Your call and the Work Programme always win; check them before you submit. GrantWise is independent and not affiliated with, endorsed by, or acting on behalf of the European Commission.