نتایج جستجو برای: public key replacement attack

تعداد نتایج: 1067033  

Journal: :CoRR 2016
Guy Kloss

For secure communication it is not just sufficient to use strong cryptography with good and strong keys, but to actually have the assurance, that the keys in use for it are authentic and from the contact one is expecting to communicate with. Without that, it is possible to be subject to impersonation or man-in-the-middle (MitM) attacks. Mega meets this problem by providing a hierarchical authen...

Journal: :I. J. Network Security 2008
Ashok Kumar Das

Key establishment in sensor networks is a challenging problem because of resource constraints of the sensors. The classical public-key routines are impractical in most sensor network architectures. In this paper, we propose a new random key pre-distribution scheme which is based on the identity-based approach for key establishment between two neighbor nodes in wireless sensor networks. Our prop...

Journal: :Theor. Comput. Sci. 2016
Hui Cui Yi Mu Man Ho Au

We revisit the notions of robustness introduced by Abdalla, Bellare and Neven (TCC 2010), and related-key attack (RKA) security raised by Bellare, Cash and Miller (ASIACRYPT 2011). In the setting of public-key encryption (PKE), robustness means that it is hard to produce a ciphertext that is valid for two different users, while RKA security means that a PKE scheme is still secure even when an a...

2012
Shota Yamada Nuttapong Attrapadung Bagus Santoso Jacob C. N. Schuldt Goichiro Hanaoka Noboru Kunihiro

In this paper, we focus on verifiability of predicate encryption. A verifiable predicate encryption scheme guarantees that all legitimate receivers of a ciphertext will obtain the same message upon decryption. While verifiability of predicate encryption might be a desirable property by itself, we furthermore show that this property enables interesting applications. Specifically, we provide two ...

Journal: :IACR Cryptology ePrint Archive 2005
Lucas Ballard Matthew Green Breno de Medeiros Fabian Monrose

We consider the problem of using untrusted components to build correlation-resistant survivable storage systems that protect file replica locations, while allowing nodes to continuously re-distribute files throughout the network. The principal contribution is a chosen-ciphertext secure, searchable public key encryption scheme which allows for dynamic re-encryption of ciphertexts, and provides f...

Journal: :IACR Cryptology ePrint Archive 2003
P. J. Abisha D. Gnanaraj Thomas K. G. Subramanian

At INDOCRYPT 2003 Abisha, Thomas, and Subramanian proposed two public key schemes based on word problems in free partially commutative monoids and groups. We show that both proposals are vulnerable to chosen ciphertext attacks, and thus in the present form must be considered as insecure.

Journal: :CoRR 2016
Masahiro Kaminaga Hideki Yoshikawa Arimitsu Shikoda Toshinori Suzuki

The Rabin cryptosystem has been proposed protect the unique ID (UID) in radio-frequency identification tags. The Rabin cryptosystem is a type of lightweight public key system that is theoretetically quite secure; however it is vulnerable to several side-channel attacks. In this paper, a crashing modulus attack is presented as a new fault attack on modular squaring during Rabin encryption. This ...

2003
Roberto Di Pietro Antonio Durante Luigi V. Mancini

This paper analyzes the Logical Key Hierarchy (LKH) secure multicast protocol focusing on the reliability of the re-keying authentication process. We show that the key management in the LKH model is subject to some attacks. In particular, these attacks can be performed by entities external to the multicast group, as well as from internal users of the multicast group. The spectrum of these attac...

Journal: :IJCSA 2009
Xin Wang Feng Feng Xinmei Wang Qi Wang

In 2007 PKC conference, Ding, et al use the second order linearization equation attack method to break what be called MFE multivariate public key encryption scheme, and also proposed a high order linearization equation attack on multivariate public key cryptosystems. To resist high order linearization equation attack, we present an enhanced MFE encryption scheme in this article. The improved sc...

2013
James Kasten Eric Wustrow J. Alex Halderman

The existing HTTPS public-key infrastructure (PKI) uses a coarse-grained trust model: either a certificate authority (CA) is trusted by browsers to vouch for the identity of any domain or it is not trusted at all. More than a thousand root and intermediate CAs can currently sign certificates for any domain and be trusted by popular browsers. This violates the principle of least privilege and cr...

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