Lattice Forward-Secure Identity Based Encryption Scheme
نویسندگان
چکیده
Protecting secret keys is crucial for cryptography. There are some relatively insecure devices (smart cards, mobile phones etc.) which have threat of key exposure. The goal of the forward security is to protect security of past uses of key even if the current secret key is exposed. In this paper we propose lattice based forward-secure identity based encryption scheme based on LWE assumption in random oracle model. We also propose lattice based forward-secure identity based encryption scheme in the standard model.
منابع مشابه
Forward-Secure Identity-based Broadcast Encryption Scheme from Lattice
Motivated by an identity-based broadcast encryption scheme from lattice[1] and a forward-secure identity-based encryption scheme[2], we propose a forward-secure identity-based broadcast encryption scheme from lattice by adding the forward-security mechanism on broadcast encryption scheme. Our scheme satisfies the security requirements of both the broadcast encryption scheme and forward-security...
متن کاملLattice Based Forward-Secure Identity Based Encryption Scheme with Shorter Ciphertext
In MIST 2012 conference Singh et al [21] presented lattice based forward-secure identity based encryption schemes based on LWE assumption in the random oracle model as well as in the standard model. In this paper we propose lattice based forward-secure identity based encryption scheme with shorter ciphertext in the random oracle model. We have reduced size of the ciphertext C from (m(i+ 2)+ 1)×...
متن کاملForward-Secure Hierarchical IBE with Applications to Broadcast Encryption
A forward-secure encryption scheme protects secret keys from exposure by evolving the keys with time. Forward security has several unique requirements in hierarchical identity-based encryption (HIBE) scheme: (1) users join dynamically; (2) encryption is joining-time-oblivious; (3) users evolve secret keys autonomously. We define and construct a scalable pairing-based forward-secure HIBE (fsHIBE...
متن کاملLattice-based Identity-Based Broadcast Encryption
Motivated by the lattice basis delegation technique due to [8], we propose an adaptively secure identity-based broadcast encryption(IBBE) scheme based on the hard worst-case lattice problems. Our construction can be generalized to a hierarchical IBBE (HIBBE) easily. Using the method in [1], we also modify our basic construction to obtain an IBBE in the standard model. To the best of the authors...
متن کاملLattice Ciphertext Policy Attribute-based Encryption in the Standard Model
A lattice ciphertext policy attribute based encryption (CP-ABE) scheme is presented, in which the ciphertext policy achieved is the AND-gates on multi-valued attributes. The previous construction with AND-gates on multi-valued attributes as ciphertext policy is based on bilinear paring technology. In this paper, inspired by the recent progress of lattice identity based encryption scheme, we ach...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- J. Internet Serv. Inf. Secur.
دوره 2 شماره
صفحات -
تاریخ انتشار 2012