Public-Key Cryptography (Dagstuhl Seminar 11391)}} (original) (raw)
Public-Key Cryptography Techniques Evaluation
Cryptography techniques play an important role in modern world. The purpose of such techniques is to ensure the contents being unreadable to anyone except for parties who agreed to use some specific scheme. Moreover, current cryptography techniques provide more sophisticated services, such as message integrity, authentication, time stamping, and many others. There are two main approaches for cryptography: private-key cryptography and public-key cryptography (PKC). In this paper we focus on PKC techniques giving a comparison between three main techniques, namely, Public key Infrastructure (PKI), Identity- Based Cryptography (IBC) and Certificate less Public Key Cryptography (CL-PKC). In this research, a brief definition, advantages and disadvantages and analysis of main problem, namely, the revocation problem, are introduced for the three techniques. Also, a variety of available solutions to overcome the revocation problem in each technique are highlighted. Finally, some common applications and schemes for each technique are summarized.
Encryption: Strengths and Weaknesses of Public-key Cryptography
Public key cryptography has become an important means of ensuring confidentiality, notably through its use of key distribution, where users seeking private communication exchange encryption keys. It also features digital signatures which allow users to sign keys to verify their identities. This research presents the innovations in the field of public-key cryptography while also analyzing their shortcomings. We present methods of improving upon the weaknesses that include techniques involving double encryption and mutual authentication. These contributions introduce new levels of security to the subject with ideas to combat man in the middle attacks and other hacker scenarios. Public-key encryption with digital signatures offers both security and data integrity against most attackers.
2000
Portions of this document have been abstracted from other U.S. Government publications, including: “Minimum InteroperabilitySpecification for PKI Components (MISPC), Version 1” NIST SP 800-15, January 1998;“Certification Authority Systems”, OCC 99-20, Office of the Comptroller of the Currency, May 4, 1999; “Guideline for Implementing Cryptography in the Federal Government”, NIST SP800-21, November 1999; Advances and Remaining Challenges to Adoption of Public
A Note on Public Key Cryptosystems
International Journal of Advanced Networking and Applications
Public key or asymmetric cryptosystems use public-private key pair for the secure transmission of data. RSA and ECC (Elliptic Curve Cryptography/Cryptosystems) are widely used cryptosystems in this category. Public key cryptosystems rely on mathematical problems known as hard problems. The security of these cryptosystems is based on these hard problems. Public key cryptosystems solve the key transportation problem of symmetric key cryptosystems and able to provides digital signatures also.
Vulnerabilities in Public Key Cryptography
International Journal of Psychosocial Rehabilitation
Cryptography plays a vital role in securing data for IT infrastructure by enabling an adequate level of security to the business. The increased significance of security in the IT infrastructure has raised the demand for public key cryptography. Public key cryptography eliminates the primary concern in private key cryptography, i.e. exchanging the key between the sender and the receiver by having a pair of keys. Public key cryptography enables the exchange of the key even in an unsecured network. After the introduction of public key cryptography, this type of cryptography is the best solution in securing the transmitted data between the sender and the receiver. However, there are vulnerabilities in this type of cryptography that both the sender and the receiver need to know. This research is focused on determining the vulnerabilities of public key cryptography. It also emphasizes how security specialists can overcome these vulnerabilities in public key cryptography.
Applications to Public Key Cryptography
Algebra for Cryptologists, 2016
In this chapter we describe, at an elementary level, some of the applications of the Group Theory and Number Theory we have developed so far to Cryptology. We emphasise that these "textbook versions" of the applications do not do justice to the complexities that arise in practice, and warn the reader that implementing the mechanisms that we discuss in the form given here would lead to severe vulnerabilities of the schemes. 1 The reader is encouraged to start by reading the paper on Why textbook ElGamal and RSA encryption are insecure. 2 Our discussion falls into two components: in the first we exploit the difficulty of factoring integers into their prime factors. In the second we use large cyclic groups in order to establish secrets known only to the participating parties. 1 And if those sentences read like just another of those painful "Disclaimers" one finds everywhere, I apologise.
Modern Cryptography - Theory and Practice
Many cryptographic schemes and protocols, especially those based on public-keycryptography, have basic or so-called "textbook crypto" versions, as these versionsare usually the subjects for many textbooks on cryptography. This book takes adifferent approach to introducing cryptography: it pays much more attention tofit-for-application aspects of cryptography. It explains why "textbook crypto" isonly good in an ideal world where data are random and bad guys behave nicely.It reveals the general unfitness of "textbook crypto" for the real world by demonstratingnumerous attacks on such schemes, protocols and systems under variousrealworld application scenarios. This book chooses to introduce a set of practicalcryptographic schemes, protocols and systems, many of them standards or de factoones, studies them closely, explains their working principles, discusses their practicalusages, and examines their strong (i.e., fit-for-application) security properties, oftenwith security evidence formally established. The book also includes self-containedtheoretical background material that is the foundation for modern cryptography.