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George Francis Hotz (born October 2, 1989), alias geohot, is an American security hacker, entrepreneur, and software engineer. He is known for developing iOS jailbreaks, reverse engineering the PlayStation 3, and for the subsequent lawsuit brought against him by Sony. Since September 2015, he has been working on his vehicle automation machine learning company comma.ai. Education He attended the Academy for Engineering and Design Technology at the Bergen County Academies, a magnet public high school in Hackensack, New Jersey. Hotz is an alumnus of the Johns Hopkins Center for Talented Youth program. Hotz also briefly attended Rochester Institute of Technology and Carnegie Mellon University. Security research iOS In August 2007, seventeen-year-old George Hotz became the first person reported to remove the SIM lock on an iPhone.
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Center For Talented Youth
The Johns Hopkins Center for Talented Youth (CTY) is a gifted education program for school-age children founded in 1979 by psychologist Julian Stanley at Johns Hopkins University. It was established as a research study into how academically advanced children learn and became the first program to identify academically talented students through above-grade-level testing and provide them with challenging learning opportunities. CTY offers summer, online, and family programs to students from around the world and has nearly 30,000 program enrollments annually. CTY is accredited for students in grades K to 12 by the Middle States Association of Colleges and Schools. CTY published the ''Imagine'' magazine that provided educational opportunities and resources and student-written content for middle and high school students. The magazine was discontinued in June 2018. History In 2022, about one-third of CTY's summer sessions were canceled due to a lack of staffing and staff backgrou ...
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Glen Rock, New Jersey
Glen Rock is a borough in Bergen County, New Jersey, United States. As of the 2020 United States census, the borough's population was 12,133, reflecting an increase of 532 (+4.6%) from the 11,601 counted in the 2010 census,DP-1 - Profile of General Population and Housing Characteristics: 2010 for Glen Rock borough, Bergen County, New Jersey
. Accessed March 5, 2013.

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SIM Lock
SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks. This is in contrast to a phone (retrospectively called SIM-free or unlocked) that does not impose any SIM restrictions. Generally phones can be locked to accept only SIM cards with certain International Mobile Subscriber Identities (IMSIs); IMSIs may be restricted by: * Mobile country code (MCC; e.g., will only work with SIM issued in one country) * Mobile network code (MNC; e.g., AT&T Mobility, T-Mobile, Vodafone, Bell Mobility etc.) * Mobile subscriber identification number (MSIN; i.e., only one SIM can be used with the phone) Additionally, some phones, especially Nokia phones, are locked by group IDs (GIDs), restricting them to a single Mobile virtual network operator (MVNO) of a certain operator. Most mobile ...
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PayPal
PayPal Holdings, Inc. is an American multinational financial technology company operating an online payments system in the majority of countries that support online money transfers, and serves as an electronic alternative to traditional paper methods such as checks and money orders. The company operates as a payment processor for online vendors, auction sites and many other commercial users, for which it charges a fee. Established in 1998 as Confinity, PayPal went public through an IPO in 2002. It became a wholly owned subsidiary of eBay later that year, valued at $1.5 billion. In 2015 eBay spun off PayPal to its shareholders, and PayPal became an independent company again. The company was ranked 143rd on the 2022 Fortune 500 of the largest United States corporations by revenue. History Early history PayPal was originally established by Max Levchin, Peter Thiel, and Luke Nosek in December 1998 as Confinity, a company that developed security software for hand-held de ...
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Injunction
An injunction is a legal and equitable remedy in the form of a special court order that compels a party to do or refrain from specific acts. ("The court of appeals ... has exclusive jurisdiction to enjoin, set aside, suspend (in whole or in part), or to determine the validity of...."); ("Limit on injunctive relief'); '' Jennings v. Rodriguez'', 583 U.S. ___, ___138 S.Ct. 830 851 (2018); '' Wheaton College v. Burwell''134 S.Ct. 2806 2810-11 (2014) ("Under our precedents, an injunction is appropriate only if (1) it is necessary or appropriate in aid of our jurisdiction, and (2) the legal rights at issue are indisputably clear.") (internal quotation marks and brackets omitted); '' Lux v. Rodrigues''561 U.S. 1306 1308 (2010); ''Correctional Services Corp. v. Malesko''534 U.S. 61 74 (2001) (stating that "injunctive relief has long been recognized as the proper means for preventing entities from acting unconstitutionally."); '' Nken v. Holder''556 U.S. 418(2009); see also ''Alli v. D ...
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Elliptic Curve Digital Signature Algorithm
In cryptography, the Elliptic Curve Digital Signature Algorithm (ECDSA) offers a variant of the Digital Signature Algorithm (DSA) which uses elliptic-curve cryptography. Key and signature-size As with elliptic-curve cryptography in general, the bit size of the private key believed to be needed for ECDSA is about twice the size of the security level, in bits. For example, at a security level of 80 bits—meaning an attacker requires a maximum of about 2^ operations to find the private key—the size of an ECDSA private key would be 160 bits. On the other hand, the signature size is the same for both DSA and ECDSA: approximately 4 t bits, where t is the security level measured in bits, that is, about 320 bits for a security level of 80 bits. Signature generation algorithm Suppose Alice wants to send a signed message to Bob. Initially, they must agree on the curve parameters (\textrm, G, n). In addition to the field and equation of the curve, we need G, a base point of pr ...
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Chaos Communication Congress
The Chaos Communication Congress is an annual conference organized by the Chaos Computer Club. The congress features a variety of lectures and workshops on technical and political issues related to security, cryptography, privacy and online freedom of speech. It has taken place regularly at the end of the year since 1984, with the current date and duration (27–30 December) established in 2005. It is considered one of the largest events of its kind, alongside DEF CON in Las Vegas. History The congress is held in Germany. It started in 1984 in Hamburg, moved to Berlin in 1998, and back to Hamburg in 2012, having exceeded the capacity of the Berlin venue with more than attendees. Since then, it attracts an increasing number of people: around attendees in 2012, over in 2015, and more than in 2017. Since 2017 it has taken place at the Trade Fair Grounds in Leipzig, since the Hamburg venue was closed for renovation in 2017 and the existing space was not enough for the growi ...
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OtherOS
OtherOS is a feature of early versions of the PlayStation 3 video game console, allowing user installed software, such as Linux or FreeBSD. The feature was removed since system firmware update 3.21, released on April 1, 2010. Software running in the OtherOS environment has access to 6 of the 7 Synergistic Processing Elements. Sony implemented a hypervisor restricting access to the RSX. IBM provided an introduction to programming parallel applications on the PlayStation 3. After OtherOS was removed, a class action lawsuit was filed against Sony on behalf of users, but was dismissed with prejudice in 2011 by a federal judge. The judge stated: "As a legal matter, ... plaintiffs have failed to allege facts or articulate a theory on which Sony may be held liable." However, this decision was overturned in a 2014 appellate court decision finding that plaintiffs had indeed made clear and sufficiently substantial claims. Ultimately, in 2016, Sony settled with users who had installed Linux ...
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PlayStation 3 System Software
The PlayStation 3 system software, is the updatable firmware and operating system of the PlayStation 3. The base operating system used by Sony for the PlayStation 3 is a fork of both FreeBSD and NetBSD known internally as ''CellOS'' or ''GameOS''. It uses XrossMediaBar as its graphical shell. The process of updating is almost identical to that of the PlayStation Portable, PlayStation Vita, and PlayStation 4. The software may be updated by downloading the update directly on the PlayStation 3, downloading it from the user's local Official PlayStation website to a PC and using a USB storage device to transfer it to the PlayStation 3, or installing the update from game discs containing update data. The initial slim PS3s Stock-keeping unit, SKU shipped with a unique firmware with new features, also seen in software 3.00. Technology System The native operating system of the PlayStation 3 is ''CellOS'', which is believed to be a Fork (software development), fork of FreeBSD; TCP/IP sta ...
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Exploit (computer Security)
An exploit (from the English verb ''to exploit'', meaning "to use something to one’s own advantage") is a piece of software, a chunk of data, or a sequence of commands that takes advantage of a bug or vulnerability to cause unintended or unanticipated behavior to occur on computer software, hardware, or something electronic (usually computerized). Such behavior frequently includes things like gaining control of a computer system, allowing privilege escalation, or a denial-of-service (DoS or related DDoS) attack. In lay terms, some exploit is akin to a 'hack'. Classification There are several methods of classifying exploits. The most common is by how the exploit communicates to the vulnerable software. A ''remote exploit'' works over a network and exploits the security vulnerability without any prior access to the vulnerable system. A ''local exploit'' requires prior access to the vulnerable system and usually increases the privileges of the person running the exploit past tho ...
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Hypervisor
A hypervisor (also known as a virtual machine monitor, VMM, or virtualizer) is a type of computer software, firmware or hardware that creates and runs virtual machines. A computer on which a hypervisor runs one or more virtual machines is called a ''host machine'', and each virtual machine is called a ''guest machine''. The hypervisor presents the guest operating systems with a virtual operating platform and manages the execution of the guest operating systems. Unlike an emulator, the guest executes most instructions on the native hardware. Multiple instances of a variety of operating systems may share the virtualized hardware resources: for example, Linux, Windows, and macOS instances can all run on a single physical x86 machine. This contrasts with operating-system–level virtualization, where all instances (usually called ''containers'') must share a single kernel, though the guest operating systems can differ in user space, such as different Linux distributions with the s ...
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IOS Version History
iOS is a mobile operating system developed by Apple Inc. It was first released as iPhone OS in June 2007. iPhone OS was renamed iOS following the release of the iPad, starting with iOS 4. With iOS 13, Apple began offering a separate operating system, iPadOS, for the iPad. iOS is also the foundation of the newer audioOS and tvOS, and shares some of its code with macOS. New iOS versions are released every year alongside new iPhone models. From its launch in 2007 until 2010, this occurred in June or July, since then, new major versions are released in September or October. Overview Hardware supported by different iOS versions Version history iPhone OS 1 Apple announced iPhone OS 1 at the iPhone keynote on January 9, 2007, and it was released to the public alongside the original iPhone on June 29, 2007. No official name was given when the iPhone was released; Apple marketing literature simply stated the iPhone ran a mobile version of " OS X". During the development phase of i ...
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