Design and evaluation of a shoulder-surfing resistant graphical password scheme
Proceedings of the working conference on Advanced visual interfaces
Attribute-based encryption for fine-grained access control of encrypted data
Proceedings of the 13th ACM conference on Computer and communications security
S3PAS: A Scalable Shoulder-Surfing Resistant Textual-Graphical Password Authentication Scheme
AINAW '07 Proceedings of the 21st International Conference on Advanced Information Networking and Applications Workshops - Volume 02
Delegating Capabilities in Predicate Encryption Systems
ICALP '08 Proceedings of the 35th international colloquium on Automata, Languages and Programming, Part II
Generalized Identity Based and Broadcast Encryption Schemes
ASIACRYPT '08 Proceedings of the 14th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
Hierarchical Identity Based Encryption with Polynomially Many Levels
TCC '09 Proceedings of the 6th Theory of Cryptography Conference on Theory of Cryptography
Predicate Privacy in Encryption Systems
TCC '09 Proceedings of the 6th Theory of Cryptography Conference on Theory of Cryptography
CRYPTO '09 Proceedings of the 29th Annual International Cryptology Conference on Advances in Cryptology
Dual System Encryption: Realizing Fully Secure IBE and HIBE under Simple Assumptions
CRYPTO '09 Proceedings of the 29th Annual International Cryptology Conference on Advances in Cryptology
Predicate encryption supporting disjunctions, polynomial equations, and inner products
EUROCRYPT'08 Proceedings of the theory and applications of cryptographic techniques 27th annual international conference on Advances in cryptology
Circular and leakage resilient public-key encryption under subgroup indistinguishability
CRYPTO'10 Proceedings of the 30th annual conference on Advances in cryptology
Factorization of a 768-bit RSA modulus
CRYPTO'10 Proceedings of the 30th annual conference on Advances in cryptology
Cryptanalysis of the convex hull click human identification protocol
ISC'10 Proceedings of the 13th international conference on Information security
Inner-product encryption under standard assumptions
Designs, Codes and Cryptography
Functional encryption: definitions and challenges
TCC'11 Proceedings of the 8th conference on Theory of cryptography
New techniques for dual system encryption and fully secure HIBE with short ciphertexts
TCC'10 Proceedings of the 7th international conference on Theory of Cryptography
Evaluating 2-DNF formulas on ciphertexts
TCC'05 Proceedings of the Second international conference on Theory of Cryptography
Fuzzy identity-based encryption
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
EUROCRYPT'10 Proceedings of the 29th Annual international conference on Theory and Applications of Cryptographic Techniques
Anonymous hierarchical identity-based encryption (without random oracles)
CRYPTO'06 Proceedings of the 26th annual international conference on Advances in Cryptology
Practical identity-based encryption without random oracles
EUROCRYPT'06 Proceedings of the 24th annual international conference on The Theory and Applications of Cryptographic Techniques
PAISI'12 Proceedings of the 2012 Pacific Asia conference on Intelligence and Security Informatics
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Functional encryption provides more sophisticated and flexible expression between the encryption key ek and decryption key dk by deriving from attribute vectors →x and policy vector →v, respectively. There is a function f(→x,→v) that determines what type of a user with a secret key dk can decrypt the ciphertext encrypted under ek. This allows an encryptor to specify a functional formula as a decryptable policy describing what users can learn from the ciphertext without knowing the decryptor's identities or public keys. In this paper, we explore two geometric-area-based key generation and functional encryption schemes (GeoEnc), where secret keys are associated with a point on a planar coordinate system and encrypt policies are associated with a line (GeoEncLine scheme) or a convex polygon (GeoEncHull scheme). If the attribute point lies on the line or inside the convex hull, the decryption key holder can decrypt the ciphertext associated with the geometric policy such as the line or the convex polygon. The proposed schemes have policy hiding as well as payload hiding characteristics. To the best of our knowledge, they are the first functional encryptions using geometric-area-based keys and policies. We give an evaluation of key distribution in a practical coordinate system and also give a security analysis with a hybrid model. The proposed schemes have many applications as sources for keys generation and policies encryption such as computer graphics security, network topology protection, secure routing and mobile networking, secure multiparty computation, secure GPS/GIS, military area protection, etc.