Search results
Results from the WOW.Com Content Network
In cryptography, a timing attack is a side-channel attack in which the attacker attempts to compromise a cryptosystem by analyzing the time taken to execute cryptographic algorithms. Every logical operation in a computer takes time to execute, and the time can differ based on the input; with precise measurements of the time for each operation ...
A time/memory/data tradeoff attack is a type of cryptographic attack where an attacker tries to achieve a situation similar to the space–time tradeoff but with the additional parameter of data, representing the amount of data available to the attacker. An attacker balances or reduces one or two of those parameters in favor of the other one or ...
One of the earliest known instances of a pixel-stealing attack was described by Paul Stone in a white paper presented at the Black Hat Briefings conference in 2013. [6] Stone's approach exploited a quirk in how browsers rendered images encoded in the SVG format.
In 2002 and 2003, Yukiyasu Tsunoo and colleagues from NEC showed how to attack MISTY and DES symmetric key ciphers, respectively. In 2005, Daniel Bernstein from the University of Illinois, Chicago reported an extraction of an OpenSSL AES key via a cache timing attack, and Colin Percival had a working attack on the OpenSSL RSA key using the Intel processor's cache.
The term "end-to-end encryption" originally only meant that the communication is never decrypted during its transport from the sender to the receiver. [9] For example, around 2003, E2EE has been proposed as an additional layer of encryption for GSM [10] or TETRA, [11] in addition to the existing radio encryption protecting the communication between the mobile device and the network infrastructure.
Their attack used a space–time tradeoff to break the double-encryption scheme in only twice the time needed to break the single-encryption scheme. In 2011, Bo Zhu and Guang Gong investigated the multidimensional meet-in-the-middle attack and presented new attacks on the block ciphers GOST, KTANTAN and Hummingbird-2. [5]
The basis of the FMS attack lies in the use of weak initialization vectors (IVs) used with RC4. RC4 encrypts one byte at a time with a keystream output from prga(); RC4 uses the key to initialize a state machine via ksa(), and then continuously modifies the state and generates a new byte of the keystream from the new state.
For the time being there are no good technical means to counteract misuse of NTP servers. In 2015, due to possible attacks to Network Time Protocol, [27] a Network Time Security for NTP (Internet Draft draft-ietf-ntp-using-nts-for-ntp-19) [28] was proposed using a Transport Layer Security implementation.