Showing Articles About
cryptography
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Henri Nurmi - 21 Dec 2020
Sniff, there leaks my BitLocker key
A low-cost method was demonstrated to extract BitLocker encryption keys by sniffing the SPI bus of a Trusted Platform Module (TPM). The attack requires brief physical access to a target machine and can be performed using publicly available tools. By capturing TPM communication, the Volume Master Key can be retrieved and used to decrypt a BitLocker-protected drive.
- Krzysztof Marciniak
- 11 Dec 2019
Digital lockpicking - stealing keys to the kingdom
A security analysis of the KeyWe Smart Lock revealed critical vulnerabilities in its Bluetooth Low Energy communication protocol. The lock's in-house key exchange mechanism allows attackers to easily intercept and decrypt device communications by exploiting a predictable common key generation process. By analyzing the mobile application and BLE traffic, the vulnerability in the lock's cryptographic design was exposed.
- Kamil Breński Krzysztof Pranczk Mateusz Fruba
- 21 Aug 2019
How Secure is your Android Keystore Authentication?
This article explores vulnerabilities in Android Keystore authentication mechanisms for local device security. Multiple security weaknesses were identified in how developers implement biometric and keystore authentication in Android applications. Frida scripts were developed to help security professionals audit and test the robustness of Android application authentication implementations.
- Piotr Osuch
- 16 Sep 2016
H-field electromagnetic sniffing
An electromagnetic side-channel attack technique using a custom H-field sensor is demonstrated to sniff secret information from electronic devices. The method involves capturing electromagnetic emissions during data transmission using off-the-shelf components like a shielded-loop antenna, low-noise amplifier, and software-defined radio. By processing the captured signals through cross-correlation and statistical analysis, hidden serial communication data can be successfully extracted.
- 24 Jun 2016
Alice, Bob, and Eve: How quantum technology can secure against adversaries
Quantum key distribution (QKD) offers a provably secure communication method that protects against potential quantum computer attacks on classical encryption. The technique uses quantum mechanics principles, specifically the Heisenberg uncertainty principle, to ensure uninterceptable communication between parties. QKD provides a robust alternative to traditional encryption methods that could be compromised by quantum computing technologies.
- 20 Jun 2016
The current state of quantum cryptography, QKD, and the future of information security
Quantum key distribution (QKD) offers a provably secure communication method based on quantum physics principles. The technology leverages the Heisenberg uncertainty principle to create encryption keys that cannot be intercepted without detection. Commercial QKD systems are being developed to extend communication ranges and integrate with existing security infrastructure.
- 14 Jun 2016
D-Wave, why all the controversy?
D-Wave's quantum computer uses quantum annealing architecture, specialized for solving optimization problems. Unlike universal quantum computers, it offers significant speed advantages for certain computational tasks but has limitations in quantum scaling and programmability. The computer can solve some optimization problems much faster than classical computers, though its applicability remains restricted to specific problem types.
- 7 Jun 2016
Quantum paradoxes: Popping the bubble with Shor's algorithm
Quantum computers pose a significant threat to current cryptographic systems through Shor's algorithm, which can efficiently factor large prime numbers used in encryption. The algorithm leverages quantum mechanical principles and Fourier transforms to break RSA encryption by finding prime factors much faster than classical computers. Increasing investments in quantum technologies suggest that cryptographic systems may become vulnerable in the future as quantum computing capabilities advance.
- Jon Cave
- 11 Apr 2014
Laravel cookie forgery, decryption, and RCE
A critical vulnerability in Laravel's encryption API allowed attackers to forge session cookies and impersonate users. The flaw enabled potential remote code execution by exploiting weaknesses in MAC verification, IV handling, and PHP object deserialization. Attackers could manipulate cookies to authenticate as any user and potentially inject malicious code through serialized PHP objects.
- Jon Cave
- 11 Apr 2014
WordPress auth cookie forgery
A vulnerability in WordPress's authentication cookie validation allows potential cookie forgery through PHP type juggling. The flaw enables attackers to bypass authentication by exploiting non-strict comparison methods in the cookie verification code. Two attack vectors were identified: MAC verification bypass and potential timing attacks to determine expected MAC values.
- John Fitzpatrick
- 7 May 2009
HashCookies - A Simple Recipe
HashCookies is a session security technique that uses random salt and hashing to generate browser-specific session cookies. The method prevents session hijacking by making stolen session IDs unusable without the original salt. Implementation requires support from both web browsers and web servers to generate secure, context-specific session identifiers.