STOC '87 Proceedings of the nineteenth annual ACM symposium on Theory of computing
Achieving independence in logarithmic number of rounds
PODC '87 Proceedings of the sixth annual ACM Symposium on Principles of distributed computing
Completeness theorems for non-cryptographic fault-tolerant distributed computation
STOC '88 Proceedings of the twentieth annual ACM symposium on Theory of computing
Multiparty unconditionally secure protocols
STOC '88 Proceedings of the twentieth annual ACM symposium on Theory of computing
The round complexity of secure protocols
STOC '90 Proceedings of the twenty-second annual ACM symposium on Theory of computing
Communication complexity of secure computation (extended abstract)
STOC '92 Proceedings of the twenty-fourth annual ACM symposium on Theory of computing
Secure computation with honest-looking parties (extended abstract): what if nobody is truly honest?
STOC '99 Proceedings of the thirty-first annual ACM symposium on Theory of computing
Constant-Round Coin-Tossing with a Man in the Middle or Realizing the Shared Random String Model
FOCS '02 Proceedings of the 43rd Symposium on Foundations of Computer Science
Foundations of Cryptography: Volume 2, Basic Applications
Foundations of Cryptography: Volume 2, Basic Applications
Bounded-concurrent secure multi-party computation with a dishonest majority
STOC '04 Proceedings of the thirty-sixth annual ACM symposium on Theory of computing
Black-box constructions for secure computation
Proceedings of the thirty-eighth annual ACM symposium on Theory of computing
How to generate and exchange secrets
SFCS '86 Proceedings of the 27th Annual Symposium on Foundations of Computer Science
Security against covert adversaries: efficient protocols for realistic adversaries
TCC'07 Proceedings of the 4th conference on Theory of cryptography
Fair secure two-party computation
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
Round efficiency of multi-party computation with a dishonest majority
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
Constant-round multiparty computation using a black-box pseudorandom generator
CRYPTO'05 Proceedings of the 25th annual international conference on Advances in Cryptology
Efficiency tradeoffs for malicious two-party computation
PKC'06 Proceedings of the 9th international conference on Theory and Practice of Public-Key Cryptography
Founding Cryptography on Oblivious Transfer --- Efficiently
CRYPTO 2008 Proceedings of the 28th Annual conference on Cryptology: Advances in Cryptology
Information Security and Cryptology --- ICISC 2008
Improved Garbled Circuit Building Blocks and Applications to Auctions and Computing Minima
CANS '09 Proceedings of the 8th International Conference on Cryptology and Network Security
Secure Two-Party Computation Is Practical
ASIACRYPT '09 Proceedings of the 15th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
Efficient and secure evaluation of multivariate polynomials and applications
ACNS'10 Proceedings of the 8th international conference on Applied cryptography and network security
Privacy-preserving data mining in presence of covert adversaries
ADMA'10 Proceedings of the 6th international conference on Advanced data mining and applications: Part I
Secure two-party computation via cut-and-choose oblivious transfer
TCC'11 Proceedings of the 8th conference on Theory of cryptography
From passive to covert security at low cost
TCC'10 Proceedings of the 7th international conference on Theory of Cryptography
Truly efficient string oblivious transfer using resettable tamper-proof tokens
TCC'10 Proceedings of the 7th international conference on Theory of Cryptography
Efficiency preserving transformations for concurrent non-malleable zero knowledge
TCC'10 Proceedings of the 7th international conference on Theory of Cryptography
A deniable group key establishment protocol in the standard model
ISPEC'10 Proceedings of the 6th international conference on Information Security Practice and Experience
Embedded SFE: offloading server and network using hardware tokens
FC'10 Proceedings of the 14th international conference on Financial Cryptography and Data Security
Optimal parameters for efficient two-party computation protocols
WISTP'12 Proceedings of the 6th IFIP WG 11.2 international conference on Information Security Theory and Practice: security, privacy and trust in computing systems and ambient intelligent ecosystems
Billion-gate secure computation with malicious adversaries
Security'12 Proceedings of the 21st USENIX conference on Security symposium
Foundations of garbled circuits
Proceedings of the 2012 ACM conference on Computer and communications security
Calling out cheaters: covert security with public verifiability
ASIACRYPT'12 Proceedings of the 18th international conference on The Theory and Application of Cryptology and Information Security
Fast two-party secure computation with minimal assumptions
Proceedings of the 2013 ACM SIGSAC conference on Computer & communications security
GPU and CPU parallelization of honest-but-curious secure two-party computation
Proceedings of the 29th Annual Computer Security Applications Conference
Fast and maliciously secure two-party computation using the GPU
ACNS'13 Proceedings of the 11th international conference on Applied Cryptography and Network Security
Secure outsourced garbled circuit evaluation for mobile devices
SEC'13 Proceedings of the 22nd USENIX conference on Security
PCF: a portable circuit format for scalable two-party secure computation
SEC'13 Proceedings of the 22nd USENIX conference on Security
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Recently, Aumann and Lindell introduced a new realistic security model for secure computation, namely, security against covert adversaries. The main motivation was to obtain secure computation protocols which are efficient enough to be usable in practice. Aumann and Lindell presented an efficient two party computation protocol secure against covert adversaries. They were able to utilize cut and choose techniques rather than relying on expensive zero knowledge proofs. In this paper, we design an efficient multi-party computation protocol in the covert adversary model which remains secure even if a majority of the parties are dishonest. We also substantially improve the two-party protocol of Aumann and Lindell. Our protocols avoid general NP-reductions and only make a black box use of efficiently implementable cryptographic primitives. Our two-party protocol is constant-round while the multi-party one requires a logarithmic (in number of parties) number of rounds of interaction between the parties. Our protocols are secure as per the standard simulation-based definitions of security. Although our main focus is on designing efficient protocols in the covert adversary model, the techniques used in our two party case directly generalize to improve the efficiency of two party computation protocols secure against standard malicious adversaries.