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Password users frequently employ passwords that are too simple, or they just reuse passwords for multiple websites. A common complaint is that utilizing secure passwords is too difficult. One possible solution to this problem is to use a…

Cryptography and Security · Computer Science 2019-06-04 Elan Rosenfeld , Santosh Vempala , Manuel Blum

Passwords remain one of the most common methods for securing sensitive data in the digital age. However, weak password choices continue to pose significant risks to data security and privacy. This study aims to solve the problem by focusing…

Cryptography and Security · Computer Science 2025-06-03 Pappu Jha , Hanzla Hamid , Oluseyi Olukola , Ashim Dahal , Nick Rahimi

Vulnerabilities related to weak passwords are a pressing global economic and security issue. We report a novel, simple, and effective approach to address the weak password problem. Building upon chaotic dynamics, criticality at phase…

Cryptography and Security · Computer Science 2015-05-27 T. V. Laptyeva , S. Flach , K. Kladko

On the premise that we are using passwords composed of multiple English words, we argue that using syntactically correct passphrases has no significant impact on the security in comparison to randomly arranged collections of words. We only…

Cryptography and Security · Computer Science 2016-03-22 Eugene Panferov

Password updates are a critical account security measure and an essential part of the password lifecycle. Service providers and common security recommendations advise users to update their passwords in response to incidents or as a critical…

Cryptography and Security · Computer Science 2025-11-17 Alexander Krause , Jacques Suray , Lea Schmüser , Marten Oltrogge , Oliver Wiese , Maximilian Golla , Sascha Fahl

Passwords are widely used for user authentication and, despite their weaknesses, will likely remain in use in the foreseeable future. Human-generated passwords typically have a rich structure, which makes them susceptible to guessing…

Cryptography and Security · Computer Science 2013-04-25 Claude Castelluccia , Abdelberi Chaabane , Markus Dürmuth , Daniele Perito

Passwords are the most common mechanism for authenticating users online. However, studies have shown that users find it difficult to create and manage secure passwords. To that end, passphrases are often recommended as a usable alternative…

Cryptography and Security · Computer Science 2023-03-17 Avirup Mukherjee , Kousshik Murali , Shivam Kumar Jha , Niloy Ganguly , Rahul Chatterjee , Mainack Mondal

The choice of password composition policy to enforce on a password-protected system represents a critical security decision, and has been shown to significantly affect the vulnerability of user-chosen passwords to guessing attacks. In…

Cryptography and Security · Computer Science 2024-03-18 Saul Johnson , João F. Ferreira , Alexandra Mendes , Julien Cordry

Recently, few certified defense methods have been developed to provably guarantee the robustness of a text classifier to adversarial synonym substitutions. However, all existing certified defense methods assume that the defenders are…

Computation and Language · Computer Science 2021-07-27 Jiehang Zeng , Xiaoqing Zheng , Jianhan Xu , Linyang Li , Liping Yuan , Xuanjing Huang

Researchers have extensively explored how password creation policies influence the security and usability of user-chosen passwords, producing evidence-based policy guidelines. However, for web authentication to improve in practice, websites…

Cryptography and Security · Computer Science 2023-09-08 Suood Alroomi , Frank Li

Despite their well-known security problems, passwords are still the incumbent authentication method for virtually all online services. To remedy the situation, end-users are very often referred to password managers as a solution to the…

Cryptography and Security · Computer Science 2017-12-27 Sanam Ghorbani Lyastani , Michael Schilling , Sascha Fahl , Sven Bugiel , Michael Backes

System passwords serve as critical credentials for user authentication and access control when logging into operating systems or applications. Upon entering a valid password, users pass verification to access system resources and execute…

Cryptography and Security · Computer Science 2026-02-03 Chaofang Shi , Zhongwen Li , Xiaoqi Li

A central challenge in password security is to characterize the attacker's guessing curve i.e., what is the probability that the attacker will crack a random user's password within the first $G$ guesses. A key challenge is that the guessing…

Cryptography and Security · Computer Science 2022-09-22 Jeremiah Blocki , Peiyuan Liu

With the rapid development of internet technologies, social networks, and other related areas, user authentication becomes more and more important to protect the data of users. Password authentication is one of the widely used methods to…

Cryptography and Security · Computer Science 2023-01-31 Lifeng Han

The National Institute of Standards and Technology (NIST) released new guidelines in June of 2017 that recommended new standards for managing and accepting user passwords. Among the new guidelines is a requirement that verifiers should…

Cryptography and Security · Computer Science 2018-05-09 JV Roig

Reusing passwords across multiple websites is a common practice that compromises security. Recently, Blum and Vempala have proposed password strategies to help people calculate, in their heads, passwords for different sites without…

Human-Computer Interaction · Computer Science 2018-05-28 Samira Samadi , Santosh Vempala , Adam Tauman Kalai

This research investigates the role of passwords and passphrases as valid authentication methodologies. Specifically, this research dispels earlier work that ignores information-theoretic lessons learned from cognitive and social psychology…

Human-Computer Interaction · Computer Science 2015-09-08 Christopher S. Pilson

Gesture and signature passwords are two-dimensional figures created by drawing on the surface of a touchscreen with one or more fingers. Prior results about their security have used resilience to either shoulder surfing, a human observation…

Cryptography and Security · Computer Science 2018-12-27 Can Liu , Shridatt Sugrim , Gradeigh D. Clark , Janne Lindqvist

In recent decades, criminals have increasingly used the web to research, assist and perpetrate criminal behaviour. One of the most important ways in which law enforcement can battle this growing trend is through accessing pertinent…

Cryptography and Security · Computer Science 2020-12-03 Aikaterini Kanta , Iwen Coisel , Mark Scanlon

There are several methods to measure computing power. On the other hand, Bit Length (BL) can be considered a metric to measure the strength of an asymmetric encryption method. We review here ways to determine the security, given an span of…

Cryptography and Security · Computer Science 2020-11-03 A. Dasso , A. Funes , D. Riesco , G. Montejano