|
Oracle Attack
In the field of security engineering, an oracle attack is an attack that exploits the availability of a weakness in a system that can be used as an "oracle" to give a simple go/no go indication to inform attackers how close they are to their goals. The attacker can then combine the oracle with a systematic search of the problem space to complete their attack. The padding oracle attack, and compression oracle attacks such as BREACH, are examples of oracle attacks, as was the practice of "crib-dragging" in the cryptanalysis of the Enigma machine. An oracle need not be 100% accurate: even a small statistical correlation with the correct go/no go result can frequently be enough for a systematic automated attack. In a compression oracle attack the use of adaptive data compression on a mixture of chosen plaintext and unknown plaintext can result in content-sensitive changes in the length of the compressed text that can be detected even though the content of the compressed text itself i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Security Engineering
Security engineering is the process of incorporating security controls into an information system so that the controls become an integral part of the system's operational capabilities. It is similar to other systems engineering activities in that its primary motivation is to support the delivery of engineering solutions that satisfy pre-defined functional and user requirements, but it has the added dimension of preventing misuse and malicious behavior. Those constraints and restrictions are often asserted as a security policy. In one form or another, security engineering has existed as an informal field of study for several centuries. For example, the fields of locksmithing and security printing have been around for many years. The concerns for modern security engineering and computer systems were first solidified in a RAND paper from 1967, "Security and Privacy in Computer Systems" by Willis H. Ware. This paper, later expanded in 1979, provided many of the fundamental information ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Test Oracle
In software testing, a test oracle (or just oracle) is a provider of information that describes correct output based on the input of a test case. Testing with an oracle involves comparing actual results of the system under test (SUT) with the expected results as provided by the oracle. The term "test oracle" was first introduced in a paper by William E. Howden. Additional work on different kinds of oracles was explored by Elaine Weyuker. An oracle can operate separately from the SUT; accessed at test runtime, or it can be used before a test is run with expected results encoded into the test logic.Jalote, Pankaj; ''An Integrated Approach to Software Engineering'', Springer/Birkhäuser, 2005, However, method postconditions are part of the SUT, as automated oracles in design by contract models. Determining the correct output for a given input (and a set of program or system states) is known as the ''oracle problem'' or ''test oracle problem'', which some consider a relatively ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Padding Oracle Attack
In cryptography, a padding oracle attack is an attack which uses the padding validation of a cryptographic message to decrypt the ciphertext. In cryptography, variable-length plaintext messages often have to be padded (expanded) to be compatible with the underlying cryptographic primitive. The attack relies on having a "padding oracle" who freely responds to queries about whether a message is correctly padded or not. The information could be directly given, or leaked through a side-channel. The earliest well-known attack that uses a padding oracle is Bleichenbacher's attack of 1998, which attacks RSA with PKCS #1 v1.5 padding. The term "padding oracle" appeared in literature in 2002, after Serge Vaudenay's attack on the CBC mode decryption used within symmetric block ciphers. Variants of both attacks continue to find success more than one decade after their original publication. Asymmetric cryptography In 1998, Daniel Bleichenbacher published a seminal paper on what became ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BREACH
Breach, Breached, or The Breach may refer to: Places * Breach, Kent, United Kingdom * Breach, West Sussex, United Kingdom * ''The Breach'', Great South Bay in the State of New York People * Breach (DJ), an Electronic/House music act * Miroslava Breach (1963–2017), Mexican journalist Arts, entertainment, and media Films * ''Breach'' (2007 film), a film directed by Billy Ray starring Chris Cooper and Ryan Phillippe * ''Breach'' (2020 film), a 2020 film starring Bruce Willis * ''The Breach'' (film), a 1970 French film by Claude Chabrol Games * ''Breach'' (1987 video game), a 1987 action game by Omnitrend Software * ''Breach'' (2011 video game), a defunct 2011 first-person shooter by Atomic Games * ''Breach'' (2018 video game), a cancelled 2018 action RPG by QC Games * ''Breached'' (video game), a 2016 action puzzle by Drama Drifters * Breach, an agent from the 2020 first-person shooter ''Valorant'' Journalism * ''The Breach'' (website), a Canadian news website launche ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptanalysis
Cryptanalysis (from the Greek ''kryptós'', "hidden", and ''analýein'', "to analyze") refers to the process of analyzing information systems in order to understand hidden aspects of the systems. Cryptanalysis is used to breach cryptographic security systems and gain access to the contents of encrypted messages, even if the cryptographic key is unknown. In addition to mathematical analysis of cryptographic algorithms, cryptanalysis includes the study of side-channel attacks that do not target weaknesses in the cryptographic algorithms themselves, but instead exploit weaknesses in their implementation. Even though the goal has been the same, the methods and techniques of cryptanalysis have changed drastically through the history of cryptography, adapting to increasing cryptographic complexity, ranging from the pen-and-paper methods of the past, through machines like the British Bombes and Colossus computers at Bletchley Park in World War II, to the mathematically advanced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enigma Machine
The Enigma machine is a cipher device developed and used in the early- to mid-20th century to protect commercial, diplomatic, and military communication. It was employed extensively by Nazi Germany during World War II, in all branches of the Wehrmacht, German military. The Enigma machine was considered so secure that it was used to encipher the most top-secret messages. The Enigma has an electromechanical Rotor machine, rotor mechanism that scrambles the 26 letters of the alphabet. In typical use, one person enters text on the Enigma's keyboard and another person writes down which of the 26 lights above the keyboard illuminated at each key press. If plaintext is entered, the illuminated letters are the ciphertext. Entering ciphertext transforms it back into readable plaintext. The rotor mechanism changes the electrical connections between the keys and the lights with each keypress. The security of the system depends on machine settings that were generally changed daily, based ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data Compression
In information theory, data compression, source coding, or bit-rate reduction is the process of encoding information using fewer bits than the original representation. Any particular compression is either lossy or lossless. Lossless compression reduces bits by identifying and eliminating statistical redundancy. No information is lost in lossless compression. Lossy compression reduces bits by removing unnecessary or less important information. Typically, a device that performs data compression is referred to as an encoder, and one that performs the reversal of the process (decompression) as a decoder. The process of reducing the size of a data file is often referred to as data compression. In the context of data transmission, it is called source coding: encoding is done at the source of the data before it is stored or transmitted. Source coding should not be confused with channel coding, for error detection and correction or line coding, the means for mapping data onto a sig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chosen Plaintext
Chosen or The Chosen may refer to: Books *The Chosen (Potok novel), ''The Chosen'' (Potok novel), a 1967 novel by Chaim Potok * ''The Chosen'', a 1997 novel by L. J. Smith (author), L. J. Smith *The Chosen (Pinto novel), ''The Chosen'' (Pinto novel), a 1999 novel by Ricardo Pinto *The Chosen (Karabel book), ''The Chosen'' (Karabel book), a book by Jerome Karabel *Chosen (Dekker novel), ''Chosen'' (Dekker novel), a 2007 novel by Ted Dekker *Chosen (Cast novel), ''Chosen'' (Cast novel), a novel in the ''House of Night'' fantasy series *Chosen (Image Comics), ''Chosen'' (Image Comics), a comic book series by Mark Millar Film and television *''Holocaust 2000'', also released as ''The Chosen'', a 1977 horror film starring Kirk Douglas *The Chosen (1981 film), ''The Chosen'' (1981 film), a film based on Potok's novel *The Chosen (2015 film), ''The Chosen'' (2015 film), a film starring YouTube personality Kian Lawley *The Chosen (2016 film), ''The Chosen'' (2016 film), by Antonio Chavarr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CRIME
In ordinary language, a crime is an unlawful act punishable by a State (polity), state or other authority. The term ''crime'' does not, in modern criminal law, have any simple and universally accepted definition,Farmer, Lindsay: "Crime, definitions of", in Cane and Conoghan (editors), ''The New Oxford Companion to Law'', Oxford University Press, 2008 (), p. 263Google Books). though statutory definitions have been provided for certain purposes. The most popular view is that crime is a Category of being, category created by law; in other words, something is a crime if declared as such by the relevant and applicable law. One proposed definition is that a crime or offence (or criminal offence) is an act harmful not only to some individual but also to a community, society, or the state ("a public wrong"). Such acts are forbidden and punishable by law. The notion that acts such as murder, rape, and theft are to be prohibited exists worldwide. What precisely is a criminal offence is def ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BREACH (security Exploit)
Breach, Breached, or The Breach may refer to: Places * Breach, Kent, United Kingdom * Breach, West Sussex, United Kingdom * ''The Breach'', Great South Bay in the State of New York People * Breach (DJ), an Electronic/House music act * Miroslava Breach (1963–2017), Mexican journalist Arts, entertainment, and media Films * ''Breach'' (2007 film), a film directed by Billy Ray starring Chris Cooper and Ryan Phillippe * ''Breach'' (2020 film), a 2020 film starring Bruce Willis * ''The Breach'' (film), a 1970 French film by Claude Chabrol Games * ''Breach'' (1987 video game), a 1987 action game by Omnitrend Software * ''Breach'' (2011 video game), a defunct 2011 first-person shooter by Atomic Games * ''Breach'' (2018 video game), a cancelled 2018 action RPG by QC Games * ''Breached'' (video game), a 2016 action puzzle by Drama Drifters * Breach, an agent from the 2020 first-person shooter ''Valorant'' Journalism * ''The Breach'' (website), a Canadian news website launched ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Side-channel Attack
In computer security, a side-channel attack is a type of security exploit that leverages information inadvertently leaked by a system—such as timing, power consumption, or electromagnetic or acoustic emissions—to gain unauthorized access to sensitive information. These attacks differ from those targeting flaws in the design of cryptographic protocols or algorithms. (Cryptanalysis may identify vulnerabilities relevant to both types of attacks). Some side-channel attacks require technical knowledge of the internal operation of the system, others such as differential power analysis are effective as black-box attacks. The rise of Web 2.0 applications and software-as-a-service has also significantly raised the possibility of side-channel attacks on the web, even when transmissions between a web browser and server are encrypted (e.g. through HTTPS or WiFi encryption), according to researchers from Microsoft Research and Indiana University. Attempts to break a cryptosystem by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
