TREDISEC is a European collaborative Research and Innovation Action that leverages existing or novel cryptographic protocols and system security mechanisms, which offer strong data confidentiality, integrity and availability guarantees while permitting efficient storage and data processing across multiple tenants.

From a practical standpoint, the ambition of this project is to develop systems and techniques that make the cloud a secure and efficient place to store data. We plan to step away from a myriad of disconnected security protocols or cryptographic algorithms, and to converge instead on a (possibly standardized) single framework where all objectives are met to the highest extent possible.

Started on April 1st 2015, the ultimate goal of TREDISEC is to converge to a unified framework where resulting primitives are integrated, while following the end-to-end security principle as closely as allowed by functional and non-functional requirements.

Cloud security requirements


  • E2E data encryption
  • processing over encrypted data

integrity and availability

  • storage integrity and availability
  • computation verifiability

Access control

  • policy enforcement
  • secure deletion

Cloud functional requirements

storage efficiency

  • data compression
  • data deduplication


  • hardware-level isolation
  • virtualization
  • application-level isolation

TREDISEC primitives

confidentiality with storage efficiency

  • compression of encrypted data
  • secure data deduplication
  • proof of ownership with data confidentiality

confidentiality with multitenancy

  • attribute based access control (ABAC)
  • Distributed (ABAC) policy enforcement
  • Secure data deletion

confidentiality & data processing

  • privacy preserving word search with data reduction
  • privacy preserving word search with multi-tenancy

availability & integrity with storage efficiencyg

  • proofs of retrievability with deduplication
  • verifiable computation


TREDISEC will participate in Trust in Digital Life event

This year's Trust in the Digital World event is to be held at the New Babylon Centre in The Hague on 15/16 June. This event is a mixture of practical demonstrations, presentations, panel discussions and “un-conference” session covering key challenges, visions and strategies. It is envisioned for those in business, public sector and government who are involved in the policy, security, systems and processes surrounding trust.

SECODIC 2016: Secure and Efficient Outsourcing of Storage and computation of Data in the Cloud

The H2020 projects WITDOM and TREDISEC, led by Atos, co-organize the workshop on "Secure and Efficient Outsourcing of Storage and computation of Data in the Cloud" (SECODIC 2016), which will be held in conjunction with the ARES EU Projects Symposium 2016, held at the 11th International Conference on Availability, Reliability and Security (ARES 2016) on August 31-September 2nd in Salzburg, Austria.


"Efficient Techniques for Publicly Verifiable Delegation of Computation"

The paper entitled “Efficient Techniques for Publicly Verifiable Delegation of Computation", authored by TREDISEC´s partner EURECOM, has been accepted at the prestigious annual ACM Symposium on InformAtion, Computer and Communications Security (ASIACCS), that will take place from 30th of May to 3rd of June in Xi´an, China,

Paper abstract