Pedro Alves

University of Campinas | UNICAMP · Institute of Computing

Security in cloud computing is a relevant topic for research. Multiple branches of industry are embracing this paradigm to reduce operational costs, improve scalability and availability. Surprisingly, several techniques are still missing to properly preserve privacy on the cloud. Employing encryption for data storage and transport is not enough onc...

Privacy-preserving smart meter data collection and analysis are critical for optimizing smart grid environments without compromising privacy. Using homomorphic encryption techniques, smart meters can encrypt collected data to ensure confidentiality, and other untrusted nodes can further compute over the encrypted data without having to recover the...

Recent works challenged the number-theoretic transform (NTT) as the most efficient method for polynomial multiplication in GPU implementations of fully homomorphic encryption schemes such as CKKS and BFV. In particular, these works argue that the discrete galois transform (DGT) is a better candidate for this particular case. However, these claims w...

Privacy guarantees are still insufficient for outsourced data processing in the cloud. While employing encryption is feasible for data at rest or in transit, it is not for computation without remarkable performance slowdown. Thus, handling data in plaintext during processing is still required, which creates vulnerabilities that can be exploited by...

Privacy guarantees are still insufficient for outsourced data processing in the cloud. While employing encryption is feasible for data at rest or in transit, it is not for computation without remarkable performance slowdown. Thus, handling data in plaintext during processing is still required, which creates vulnerabilities that can be exploited by...

No contexto da computação na nuvem, a aplicação de métodos criptográficos exclusivamente no armazenamento e transporte dos dados não é suficiente, uma vez que precisam ser revelados ao serviço para ocorrer processamento. Esquemas de cifração homomórfica são candidatos naturais para computação sobre dados cifrados, o que os torna capazes de satisfaz...

Cloud computing is a ubiquitous paradigm responsible for a fundamental change in the way distributed computing is performed. The possibility to outsource the installation, maintenance and scalability of servers, added to competitive prices, makes this platform highly attractive to the computing industry. Despite this, privacy guarantees are still i...

Cloud computing is a ubiquitous paradigm. It has been responsible for a fundamental change in the way distributed computing is performed. The possibility to outsource the installation, maintenance and scalability of servers, added to competitive prices, makes this platform highly attractive to the industry. Despite this, privacy guarantees are stil...

Under the dominant cloud computing paradigm, employing encryption for data storage and transport may not be enough. Security guarantees should also be extended to data processing. Homomorphic encryption schemes are natural candidates for computation over encrypted data since they are able to satisfy the requirements imposed by the cloud environment...

Cloud computing is a ubiquitous paradigm. It has been responsible for a fundamental change in the way distributed computing is performed. The possibility to outsource the installation, maintenance and scalability of servers, added to competitive prices, makes this platform highly attractive to the industry. Despite this, privacy guarantees are stil...

Em tempos de computação em nuvem, há interesse em se utilizar criptossistemas que não apenas garantam a segurança dos dados no transporte e armazenamento, mas também durante o processamento, de forma a preservar a privacidade dos contratantes e detentores dos dados. Esquemas de cifração homomórfica são candidatos promissores para computação sobre d...