Pretty Good Privacy (PGP) is an encryption program that provides cryptographic privacy and authentication for data communication. PGP is used for signing, encrypting, and decrypting texts, e-mails, files, directories, and whole disk partitions and to increase the security of e-mail communications. Phil Zimmermann developed PGP in 1991.
A cypherpunk is one who advocates the widespread use of strong cryptography and privacy-enhancing technologies as a means of effecting social and political change. The cypherpunk movement originated in the late 1980s and gained traction with the establishment of the "Cypherpunks" electronic mailing list in 1992, where informal groups of activists, technologists, and cryptographers discussed strategies to enhance individual privacy and resist state or corporate surveillance. Deeply libertarian in philosophy, the movement is rooted in principles of decentralization, individual autonomy, and freedom from centralized authority. Its influence on society extends to the development of technologies that have reshaped global finance, communication, and privacy practices, such as the creation of Bitcoin and other cryptocurrencies, which embody cypherpunk ideals of decentralized and censorship-resistant money. The movement has also contributed to the mainstreaming of encryption in everyday technologies, such as secure messaging apps and privacy-focused web browsers. The cypherpunk ethos has had a lasting impact on debates around digital rights, surveillance, and personal freedoms in the 21st century. The movement has been active since at least 1990 and continues to inspire initiatives aimed at fostering a more private and secure digital world.
Daniel Julius Bernstein is an American mathematician, cryptologist, and computer scientist. He was a visiting professor at CASA at Ruhr University Bochum until 2024, as well as a research professor of Computer Science at the University of Illinois at Chicago. Before this, he was a visiting professor in the department of mathematics and computer science at the Eindhoven University of Technology.
40-bit encryption refers to a (now broken) key size of forty bits, or five bytes, for symmetric encryption; this represents a relatively low level of security. A forty bit length corresponds to a total of 240 possible keys. Although this is a large number in human terms (about a trillion), it is possible to break this degree of encryption using a moderate amount of computing power in a brute-force attack, i.e., trying out each possible key in turn.
The export of cryptography from the United States to other countries has experienced various levels of restrictions over time. World War II illustrated that code-breaking and cryptography can play an integral part in national security and the ability to prosecute war. Changes in technology and the preservation of free speech have been competing factors in the regulation and constraint of cryptographic technologies for export.
In cryptography, the EFF DES cracker is a machine built by the Electronic Frontier Foundation (EFF) in 1998, to perform a brute force search of the Data Encryption Standard (DES) cipher's key space – that is, to decrypt an encrypted message by trying every possible key. The aim in doing this was to prove that the key size of DES was not sufficient to be secure.
Marilyn Hall Patel is a former United States district judge of the United States District Court for the Northern District of California.
Hepting v. AT&T, 439 F.Supp.2d 974, was a class action lawsuit argued before the United States District Court for the Northern District of California, filed by Electronic Frontier Foundation (EFF) on behalf of customers of the telecommunications company AT&T. The plaintiffs alleged that AT&T permitted and assisted the National Security Agency (NSA) in unlawfully monitoring the personal communications of American citizens, including AT&T customers, whose communications were routed through AT&T's network.
Cryptography is the practice and study of encrypting information, or in other words, securing information from unauthorized access. There are many different cryptography laws in different nations. Some countries prohibit the export of cryptography software and/or encryption algorithms or cryptoanalysis methods. Some countries require decryption keys to be recoverable in case of a police investigation.
Junger v. Daley is a court case brought by Peter Junger challenging restrictions on the export of encryption software outside of the United States.
John Doe v. Alberto R. Gonzales was a case in which the American Civil Liberties Union (ACLU), Library Connection, and several then-pseudonymous librarians, challenged Section 2709 of the Patriot Act; it was consolidated on appeal with a separate case, Doe v. Ashcroft.
United States v. Arnold, 533 F.3d 1003, is a United States court case in which the United States Court of Appeals for the Ninth Circuit held that the Fourth Amendment to the United States Constitution does not require government agents to have reasonable suspicion before searching laptops or other digital devices at the border, including international airports.
Cryptography, or cryptology, is the practice and study of techniques for secure communication in the presence of adversarial behavior. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, information security, electrical engineering, digital signal processing, physics, and others. Core concepts related to information security are also central to cryptography. Practical applications of cryptography include electronic commerce, chip-based payment cards, digital currencies, computer passwords, and military communications.
The Electronic Frontier Foundation (EFF) is an international non-profit digital rights group based in San Francisco, California. It was founded in 1990 to promote Internet civil liberties.
The Electronic Frontier Foundation (EFF) is an international non-profit advocacy and legal organization based in the United States and serves its operations worldwide.
Nordyke v. King was a case in the United States Court of Appeals for the Ninth Circuit in which a ban of firearms on all public property and whether the Second Amendment should be applied to the state and local governments is to be decided. After several hearings at different levels of the federal court system, Alameda County, California promised that gun shows could be held on county property, essentially repudiating its ordinance.
Robert L. "Bob" Corn-Revere is an American First Amendment lawyer. Corn-Revere is the Chief Counsel at the Foundation for Individual Rights and Expression and was formerly a partner at Davis Wright Tremaine LLP in Washington, D.C. He is regularly listed as a leading First Amendment and media law practitioner by The Best Lawyers in America (Woodward/White), SuperLawyers Washington, D.C., and by Chambers USA. Best Lawyers in America named him as Washington, D.C.’s 2017 “Lawyer of the Year” in the areas of First Amendment Law and Litigation – First Amendment. He was again named as Best Lawyers’ “Lawyer of the Year” for First Amendment Law for 2019 and 2021, and in Media Law for 2022. In 2022 he was listed in Washingtonian Magazine's Top Lawyers Hall of Fame for Lifetime Achievement.
Jewel v. National Security Agency, 673 F.3d 902, was a class action lawsuit argued before the District Court for the Northern District of California and the Court of Appeals for the Ninth Circuit, filed by Electronic Frontier Foundation (EFF) on behalf of American citizens who believed that they had been surveilled by the National Security Agency (NSA) without a warrant. The EFF alleged that the NSA's surveillance program was an "illegal and unconstitutional program of dragnet communications surveillance" and claimed violations of the Fourth Amendment.
Attempts, unofficially dubbed the "Crypto Wars", have been made by the United States (US) and allied governments to limit the public's and foreign nations' access to cryptography strong enough to thwart decryption by national intelligence agencies, especially the National Security Agency (NSA).
City of Los Angeles v. Patel, 576 U.S. 409 (2015), was a United States Supreme Court case in which the Court held that a Los Angeles law, Municipal Code § 41.49, requiring hotel operators to retain records about guests for a 90-day period, is facially unconstitutional under the Fourth Amendment to the United States Constitution because it does not allow for pre-compliance review.
