Communications of the ACM
Non-Interactive and Information-Theoretic Secure Verifiable Secret Sharing
CRYPTO '91 Proceedings of the 11th Annual International Cryptology Conference on Advances in Cryptology
A Concrete Security Treatment of Symmetric Encryption
FOCS '97 Proceedings of the 38th Annual Symposium on Foundations of Computer Science
Practical Techniques for Searches on Encrypted Data
SP '00 Proceedings of the 2000 IEEE Symposium on Security and Privacy
Order preserving encryption for numeric data
SIGMOD '04 Proceedings of the 2004 ACM SIGMOD international conference on Management of data
Monotone minimal perfect hashing: searching a sorted table with O(1) accesses
SODA '09 Proceedings of the twentieth Annual ACM-SIAM Symposium on Discrete Algorithms
Efficient and provably secure aggregation of encrypted data in wireless sensor networks
ACM Transactions on Sensor Networks (TOSN)
Order-Preserving Symmetric Encryption
EUROCRYPT '09 Proceedings of the 28th Annual International Conference on Advances in Cryptology: the Theory and Applications of Cryptographic Techniques
Privacy-Preserving Computation and Verification of Aggregate Queries on Outsourced Databases
PETS '09 Proceedings of the 9th International Symposium on Privacy Enhancing Technologies
Public-key cryptosystems based on composite degree residuosity classes
EUROCRYPT'99 Proceedings of the 17th international conference on Theory and application of cryptographic techniques
The sum of PRPs is a secure PRF
EUROCRYPT'00 Proceedings of the 19th international conference on Theory and application of cryptographic techniques
Deterministic and efficiently searchable encryption
CRYPTO'07 Proceedings of the 27th annual international cryptology conference on Advances in cryptology
Privacy preserving mapping schemes supporting comparison
Proceedings of the 2010 ACM workshop on Cloud computing security workshop
FC'10 Proceedings of the 14th international conference on Financial cryptograpy and data security
Order-preserving encryption revisited: improved security analysis and alternative solutions
CRYPTO'11 Proceedings of the 31st annual conference on Advances in cryptology
CryptDB: protecting confidentiality with encrypted query processing
SOSP '11 Proceedings of the Twenty-Third ACM Symposium on Operating Systems Principles
Aggregation queries in the database-as-a-service model
DBSEC'06 Proceedings of the 20th IFIP WG 11.3 working conference on Data and Applications Security
SP 800-22 Rev. 1a. A Statistical Test Suite for Random and Pseudorandom Number Generators for Cryptographic Applications
Live digital, remember digital: State of the art and research challenges
Computers and Electrical Engineering
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Tracking expenses is a task performed in homes and businesses worldwide; for personal finances, the practice of organizing receipts for refunds or summarizing its contents for purposes such as budget planning and tax submission, has been recently aided by different services; these allow automatic collection of receipts either at store terminals or using a photo of the receipt submitted by the user, which can be later accessed using an online interface. Given the importance of financial information and the inherent danger introduced by these services, we present in this article an architecture based on additive homomorphic cryptosystems and secret sharing schemes to store information securely while still allowing fast aggregation queries at an outsourced untrusted cloud server. The proposal was evaluated in terms of security, server load, amount of user interaction, computational load at the acquiring terminal and computational load at the untrusted server.