In this paper, we present the enhancement of a lightweight key-policy attribute-based encryption (KP-ABE) scheme designed for Internet Things (IoT). The KP-ABE was claimed to achieve ciphertext indistinguishability under chosen-plaintext attack in selective-set model but show that is insecure even weaker security notion, namely, one-way same and model. particular, an attacker can decrypt which does not satisfy policy imposed on his decryption key. Subsequently, propose efficient fix as well...

Abstract Mobile devices, particularly the touch screen mobile are increasingly used to store and access private sensitive data or services, this has led an increased demand for more secure usable security one of which is user authentication. Currently, device authentication services mainly use a knowledge-based method, e.g. PIN-based and, in some cases, fingerprint-based method also supported. The vulnerable impersonation attacks, while can be unreliable sometimes. To overcome these...

Abstract Ensuring the cloud data security is a major concern for corporate subscribers and in some cases private users. Confidentiality of stored can be managed by encrypting at client side before outsourcing it to remote storage server. However, once encrypted, will limit server’s capability keyword search since encrypted server simply cannot make plaintext on data. But again we need functionality efficient retrieval To maintain user’s confidentiality, should able perform over additionally...

The adoption of network flow in the domain Network-based Intrusion Detection System (NIDS) has steadily risen popularity. Typically, NIDS detects intrusions by inspecting contents every packet. Flow-based approach, however, uses only features derived from aggregated packet head ers. In this paper, all publicly accessible and labeled data sets are explored. Following advances deep learning techniques, performances Long Short-Term Memory (LSTM) also presented compared with various machine...

Based on some analyses of existing chaotic image encryption frameworks and a new designed three-dimensional improved logistic map (3D-ILM), an asymmetric algorithm using public-key Rivest–Shamir–Adleman (RSA) is presented in this paper. In the first stage, 3D-ILM proposed to enhance behavior considering analysis time sequence, Lyapunov exponent, Shannon entropy. second combined with public key RSA algorithm, acquisition mathematical model (MKA) constructed obtain initial keys for 3D-ILM....

In this article, we cryptanalyzed a Verifiable Threshold Predicate Encryption (VTPE) enabled Privacy-Preserving Biometric Authentication (PPBA) protocol reported in IEEE-TDSC and revealed discrepancies between its security claims our analysis. To be precise, the underlying authentication key agreement scheme which is based on challenge-response mechanism watermark signal unsatisfactorily meets following scenario: (a) resistance to man-in-the-middle attacks, (b) biometric template protection,...

Recently, attribute-based keyword search (ABKS) schemes have been used to provide fine-grained over encrypted data on eHealth cloud in the Internet of Things (IoT) platforms. As compared conventional public key encryption with (PEKS) schemes, ABKS more powerful and flexible operations which allow be retrieved by multiple users that satisfy set attributes. However, there are still some limitations security issues existing schemes. Many only support for require a separate cryptographic...

In 2008, Chin et al. proposed an efficient and provable secure identity-based identification scheme in the standard model.However, we discovered a subtle flaw security proof which renders of useless.While no weakness has been found itself, that is desired would be one with accompanying security.In this paper, provide fix to overcome problem without affecting efficiency as well new particular, show only extra pre-computable pairing operation should added into commitment phase protocol under...

Most identity-based identification (IBI) schemes proposed in recent literature are built using pairing operations. This decreases efficiency due to the high operation costs of pairings. Furthermore, most these IBI proven be secure against impersonation under active and concurrent attacks interactive assumptions such as one-more RSA inversion assumption or discrete logarithm assumption, translating weaker security guarantees nature assumptions. The Schnorr-IBI scheme was first through...

This paper discusses how to implement Paillier homomorphic encryption (HE) scheme in Java as an API. We first analyze existing Pailler HE libraries and discuss their limitations. then design a comparatively accomplished efficient library. As proof of concept, we applied our library electronic voting system that allows the server sum up candidates' votes encrypted form with voters remain anonymous. Our records average only 2766ms for each vote placement through HTTP POST request.

In this comment paper, we point out a security flaw in data access control system which is built on ciphertext-policy attribute-based encryption (CP-ABE) and signature schemes. particular, show that the underlying CP-ABE vulnerable to collusion attack. As result, malicious users can collaborate decrypt ciphertext, they are not authorized decrypt.

In 2018, Yang et al. proposed a decentralized multi-authority attribute-based encryption scheme for cloud computing applications and proved its security using the dual system technique. this comment, we show that al.'s does not achieve one-wayness under key-only attack user collusion attack, respectively. with knowledge of public parameters only, an adversary can impersonate attribute authorities to forge secret keys. malicious users collude by sharing their keys unauthorizedly decrypt...

In 2011, Eissa, Razak and Ngadi proposed a lightweight authentication encryption scheme to enhance the performance for mobile ad hoc network in Wireless Network, Vol. 17, No. 4, 2011. The main building block of such is an identity-based scheme. was proven secure random oracle model assuming computational Diffie-Hellman assumption hard. this paper, we show that not even against chosen plaintext attack, which lowest acceptable level security. addition, demonstrate RSA parameter suggested by...

ABSTRACT Fuzzy identity‐based identification (FIBI) scheme is a recently proposed cryptographic protocol. The utilizes user biometric trait as public keys. authentication deemed success in the presence of genuine query together with valid private key. Because fuzziness nature biometrics, FIBI does not correct errors on respect to key; instead, it tolerates using Lagrange polynomial interpolation. Therefore, requires be represented discrete (binary or integer) array that fixed length. In this...