New constructions of fuzzy identitybased encryption. A fuzzy ibe scheme allows for a private key for an identity. Most csmath undergrads run into the wellknown rsa cryptosystem at some point. Fuzzy identity based encryption fibe is a good candidate for resolving this problem. Fuzzy identitybased encryption fibe has found many applications, such as biometricbased encryption, since its notion was. Jan 01, 2010 read new fuzzy identity based encryption in the standard model, informatica on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. New fuzzy identitybased encryption in the standard model 395 of the sahaiwaters construction can be greatly reduced. Fuzzy certificateless identitybased encryption protocol. All are secure against selectiveidentity attacks in the standard model. New constructions of fuzzy identitybased encryption citeseerx. Lncs 6506 anonymous fuzzy identitybased encryption for. Its algorithm model designed is based on the shamirs secret sharing and bili12 near pairings in cyclical group. One of the first such systems was proposed by boneh, lynn and shacham 5. Pdf new fuzzy identitybased encryption in the standard model.
In 2005, waters first proposed the concepts of attributebased encryption and functional encryption with amit sahai. In this paper, we show how to minimize the damage of secret key exposure in fibe. Research article a fuzzy identitybased signature scheme from. One common feature of all previous identitybased encryption systems is that they view identities as a string of characters. Ibe, that is called fuzzy identitybased encryption fibe. Vipul goyal virendra kumar abstract identitybased encryption ibe is an exciting alternative to publickey encryption, as ibe. Read new fuzzy identitybased encryption in the standard model, informatica on deepdyve, the largest online rental service for scholarly research with thousands of academic. In this paper we propose a new type of identitybased encryption that we call. As such it is a type of publickey encryption in which the public key of a user is some. Fuzzy identity based encryption from lattices shweta agrawal xavier boyeny vinod vaikuntanathanz panagiotis voulgarisx hoeteck wee february 26, 2012 abstract cryptosystems based on the hardness of lattice problems have recently acquired much.
Symmetric key fuzzy identitybased encryption ibe is a special type of ibe in secret key model. At eurocrypt 2005, sahai and waters presented the fuzzy identity based encryption fuzzy ibe which could be used for biometrics and attribute based encryption in the selective identity model. At eurocrypt 2005, sahai and waters presented the fuzzy identity based encryption fuzzyibe which could be used for biometrics and attributebased encryption in the selectiveidentity model. In 2005, waters first proposed the concepts of attribute based encryption and functional encryption with amit sahai. In 20, waters, along with amit sahai, sanjam garg, craig gentry, shai halevi, and. Not only do our schemes provide public parameters whose size is independent of the number. In this work, we construct \ fuzzy identity based encryption from the hardness of the standard learning with errors lwe problem. We propose a new type of identity based encryption that we call fuzzy identity based encryption. When a secure fuzzy ibe scheme in the selective identity model is transformed to full identity model it exist an exponential loss of security. Revocable identitybased encryption ribe has attracted a lot of attention in recent years, many ribe schemes have been.
In this paper 3 the author studied that the another kind of identity based encryption ibe plan that we call fuzzy personality based encryption. Pdf in a fuzzy identitybased encryption ibe scheme, a user with the secret key for an identity id is able to decrypt a ciphertext encrypted with. Not only do our schemes provide public parameters whose size is independent of the number of attributes in each identity used as public key but they also have useful structures which result in more efficient key extraction andor encryption than the random oracle version of sahai and. In a fuzzy identity based encryption scheme a user with secret key for the identity id is able to decrypt a ciphertext encrypted with the public key id0 if and only if id and id0. Identitybased broadcast encryption with constant size ciphertexts and private keys. Alice authenticates herself to an authority and obtains the private key corresponding to this id. Ibe, that is called fuzzy identity based encryption fibe. The major di erence between ibe and fibe is, that in fibe the identity is a set of attributes.
Davis nist workshop, 34 june 2008 pairings in cryptography tool for building public key primitives new functionality improved. We give cpa and cca secure variants of our construction, for small and. Identitybased cryptography data security blog thales. Adaptiveid secure revocable identitybased encryption. Like traditional identitybased encryption ibe systems, a fibe consists of four algorithms. A fluffy ibe plan takes into account a private key for a. For the equality threshold version, we provide an anonymous fuzzy identitybased encryption scheme achieving the mc level of security with both the size of ciphertext and token equal to om. But about 10 years ago boneh and franklin introduced a practical identitybased encryption system ibe that has excited. Fully secure fuzzy identitybased encryption for secure iot. Voltage security technology overview information encryption for email, files, documents and databases voltage solutions are built upon two innovations of cryptography identitybased. New fuzzy identitybased encryption in the standard model. Meanwhile, researchers are always concerned with fuzzy identity based signature fibs scheme from lattices. Identitybased encryption, revocation, provable security 1.
Fuzzy identitybased encryption fuzzy identitybased encryption fibe is a kind of public key cryptography. Examples arise when using ones biometric information. Identitybased encryption with efficient revocation georgia tech. We give cpa and cca secure variants of our construction, for small and large universes of attributes. Unfortunately, their ribe scheme only o ers security guarantees in the relaxed selectiveid. Revocation functionality is necessary and crucial to identitybased cryptosystems. Fuzzy identitybased encryption cryptology eprint archive. Vipul goyal virendra kumar abstract identitybased encryption ibe is an exciting alternative to publickey encryption, as ibe eliminates the need for a public key infrastructure pki. Id based encryption, or identity based encryption ibe, is an important primitive of id based cryptography. Attribute based encryption abe 1,2, which was first introduced in 2006 as a generalization of identity based encryption ibe 3,4 and fuzzy identity based encryption fibe 1, 5, is such a. In fuzzy ibe we view an identity as set of descriptive attributes. Securing brokerless publishsubscribe system using fuzzy identitybased encryption maithily b m. But about 10 years ago boneh and franklin introduced a practical identity based encryption system ibe that has excited much of the research community and produced a huge flood of followup work. Even though shamir had already provided one possible identity based signature system based on rsa in his seminal proposal, other researchers have since discovered pairing based ibs systems to complement the pairing based encryption systems.
Securing brokerless publishsubscribe system using fuzzy. Its algorithm model designed is based on the shamirs secret sharing and bili12 near. Not only do our schemes provide public parameters whose size is independent of the number of attributes in each identity used as public key but they also have useful structures which result in more efficient key extraction andor encryption than the random oracle version of. Been having a great deal of difficulty understanding the use of simulators to prove security of abe schemes so i though i would start from the first abe paper fuzzy identity based encryption to try and understand it better. Download pdf fuzzy identity based encryption by amit sahai and brent waters proceedings of eurocrypt 2005 download pdf efficient identitybased encryption without random oracles by brent waters proceedings of eurocrypt 2005 download pdf. Fuzzy identitybased encryption fibe is a good candidate for resolving this problem. Attribute based encryption abe 1,2, which was first introduced in 2006 as a generalization of identity based encryption ibe 3,4 and fuzzy identitybased encryption fibe 1, 5, is such a. In fuzzy ibe we see a way of life as set of illustrative qualities. Fuzzy identitybased encryption fibe scheme is a kind of identitybased encryption ibe scheme, in which any users identity is composed by a set of attributes and any ciphertext encrypted under. Fuzzy certificateless identitybased encryption protocol from. Generic constructions of biometric identity based encryption. In a fuzzy identity based encryption scheme a user with secret key for the identity id is able to decrypt a ciphertext encrypted with the public key id if and only if id. Revocable identitybased encryption and serveraided.
Before attributebased encryption was introduced there were other systems that attempted to address access control of encrypted data 29, 8 by using secret sharing schemes 17, 9, 26, 5, 3 combined. Anonymous fuzzy identitybased encryption for similarity search 63 does not provide the property of anonymity i. However, existing fibe schemes suffer from the following disadvantages. In a fibe system, however, the identity is viewed as a set of attributes. In this paper we propose a new type of identity based encryption that we call fuzzy identitybased encryption in which we view identities as a set of descriptive attributes.
Symmetric key fuzzy identity based encryption ibe is a special type of ibe in secret key model. In this paper we propose a new type of identity based encryption that we call fuzzy identity based encryption in which we view identities as a set of descriptive attributes. Been having a great deal of difficulty understanding the use of simulators to prove security of abe schemes so i though i would start from the first abe paper fuzzy identity based encryption to try and. Given a security parameter l, the private key generator pkg generates the master secret key ms and the public.
In a fuzzy identitybased encryption scheme, a user with the secret key for the identity. In this paper, we propose anonymous fuzzy identitybased encryption schemes to handle both the equality i. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Any setting, pki or identitybased, must provide a means to revoke users from. In this paper, we give a fuzzy certificateless identity based encryption scheme from lattice, whose security is based on the hardness of the learning with errors lwe problem. Due to their conjectured resistance to quantum cryptanalysis, strong worstcaseaveragecase security guarantees, ease of implementation and increasing practicality, latticebased cryptography is one of. We give exact definitions for secure personality based encryption plans and give a few applications for such frameworks. Fuzzy identity based encryption from lattices shweta agrawal xavier boyeny vinod vaikuntanathanz panagiotis voulgarisx hoeteck wee february 26, 2012 abstract cryptosystems based on the. Before attribute based encryption was introduced there were other systems that attempted to address access control of encrypted data 29, 8 by using secret sharing schemes 17, 9, 26, 5, 3 combined with identity based encryption.
An introduction to identity based encryption matt franklin u. Namely, in fuzzy ibe, a user with the secret key for the identity. An fibs scheme from lattices was r st proposed by yao and li. It allows users with identity w can decrypt ciphertext for w if and only if w is close enough. In a fuzzy identitybased encryption ibe scheme, a user with the secret key for an identity id is able to decrypt a ciphertext encrypted with another identity id if and only if id and id are within a. An efficient and provable secure revocable identitybased. Identitybased encryption ibe plan that we call fuzzy personality based encryption. Fuzzy identitybased encryption proceedings of the 24th annual. As such it is a type of publickey encryption in which the public key of a user is some unique information about the identity of the user e. In a fuzzy identity based encryption ibe scheme, a user with the secret key for an identity id is able to decrypt a ciphertext encrypted with another identity id if and only if id and id are within a certain distance of each other as judged by some metric. It allows users with identity w can decrypt ciphertext for w if and only if w is close enough to w. Cryptanalysis of a fuzzy identity based encryption scheme in. Attributebased encryption abe 1,2, which was first introduced in 2006 as a generalization of identitybased encryption ibe 3,4 and fuzzy identitybased encryption fibe 1, 5, is such a. In this paper we construct two new fuzzy identitybased encryption ibe schemes in the random oracle model.
Research article a fuzzy identitybased signature scheme. Secure symmetric key fuzzy identitybased encryption. In this paper we extend the notion to the case of fuzzy identity based encryption, and give a formal definition of symmetric key fuzzy ibe and its security requirements. In this paper we construct two new fuzzy identity based encryption ibe schemes in the random oracle model. In 20, waters, along with amit sahai, sanjam garg, craig gentry, shai halevi, and mariana raykova, published a proof of concept of the indistinguishability obfuscation primitive. Even though shamir had already provided one possible identitybased signature system based on rsa in his seminal proposal, other researchers have since discovered pairingbased ibs systems to.
Attributebased encryption for finegrained access control. Jpair is a pure java implementation of bilinear pairing, a useful cryptographic primitive underneath crypto schemes such as identitybased encryption ibe, attributebased. In this paper we extend the notion to the case of fuzzy identitybased encryption, and give a formal definition. What is ibe exactly and in what way does it improve over conventional publickey systems like rsa. We introduce a new type of identitybased encryption ibe scheme that we call fuzzy identitybased encryption.
We introduce a new notion which we call fuzzy identitybased keyinsulated. In the scheme, the user can choose his own secret key that the kgc cannot obtain, which is an efficient approach to mitigate the key escrow problem in fuzzy identity. Identitybased encryption, revocation, provable security. One common feature of all previous identity based encryption systems is that they view identities as a string of characters.
Idbased encryption, or identitybased encryption ibe, is an important primitive of idbased cryptography. A fuzzy ibe scheme is exactly like an identity based encryption scheme except that considering identities as bitvectors in f0. Fully secure fuzzy identitybased encryption for secure. We introduce a new type of identity based encryption ibe scheme that we call fuzzy identity based encryption. The fuzzyibe scheme builds upon several ideas from identitybased encryption 9, 34, 17.