The Man-in-the-Middle (MITM) attack has become widespread in networks nowadays. The MITM attack would cause serious information leakage and result in tremendous loss to users. Previous work applies game theory to analyze the MITM attack-defense problem and computes the optimal defense strategy to minimize the total loss. It assumes that all defenders are cooperative and the attacker know defend...

The meet-in-the-middle (MITM) attack on AES is a great success. In this paper, we apply the method to the lightweight SPN block cipher mCrypton. We prove that the multiset technique used to analyze AES can not be applied directly to mCrypton due to the scarcity of information. As a solution, we replace the unordered multiset with the ordered sequence. We lower the memory requirement from 2 to 2...

ZRTP is a protocol designed to set up a shared secret between two communication parties which is subsequently used to secure the media stream (i.e. the audio data) of a VoIP connection. It uses Diffie-Hellman (DH) key exchange to agree upon a session key, which is inherently vulnerable to active Man-in-the-Middle (MitM) attacks. Therefore ZRTP introduces some proven methods to detect such attac...

With the recent revelations about pervasive surveillance on the Internet, there is renewed interest in techniques that protect against passive eavesdropping without relying on a Public Key Infrastructure (PKI). An ephemeral Diffie-Hellman (DH) key agreement can provide such protection, but (without authentication) the exchange is vulnerable to a Man in the Middle (MitM) attack. An example of a ...

A main contribution of this paper is an improved analysis against HMAC instantiating with reduced Whirlpool. It recovers equivalent keys, which are often denoted as Kin and Kout, of HMAC with 7-round Whirlpool, while the previous best attack can work only for 6 rounds. Our approach is applying the meet-in-the-middle (MITM) attack on AES to recover MAC keys of Whirlpool. Several techniques are p...

In this article, an enhanced version of address resolution protocol (ARP) is proposed to prevent ARP poisoningbased man-in-the-middle (MITM) attacks in wired or wireless LAN environments. The proposed mechanism is based on the idea that when a node knows the correct MAC address for a given IP address, if it does not delete the mapping while the machine is alive, then MITM attack is not possible...

Wired networks are prone to the same attacks as wireless ones, including sniffing, spoofing and Man-in-the-middle attacks (MITM). In this paper we show how wireless networks are particularly vulnerable to a simple MITM that can make even rudimentary web surfing dangerous. We describe how we performed the attack and its ramifications. We argue why it is essential to have a VPN tunnel from the cl...

Meet-in-the-Middle (MitM) fault analysis is a kind of powerful cryptanalytic approach suitable for various block ciphers. When applying the method to analyze the security of block ciphers, it is very crucial to find effective MitM characteristics based on some fault models. In this paper, we investigate the security of word-oriented SPN block ciphers by means of MitM fault analysis, and observe...

In this paper, combining the biclique cryptanalysis with the MITM attack, we present the first key recovery method for the full ARIA256 faster than brute-force. The attack requires 280 chosen plaintexts, and the time complexity is about 2255.2 full-round ARIA encryptions in the processing phase. keywords: Block Cipher; ARIA-256; Biclique structure

TCP/IP protocols have long been subject to man-in-the-middle (MITM) attacks, but the advent of SSL/TLS was supposed to mitigate that risk for web transactions by providing endpoint authentication and encryption. The advent of Dug Song's 'webmitm' in late 2000 demonstrated the feasibility of mounting an MITM attack on the protocol, but a properlyconfigured client SSL implementation would warn th...