DSpace Repository :: Browsing by Subject "kryptografia"

The asymmetric-key (public-key) encryption scheme is considered to be the most important discovery in the history of cryptography. It is based on the use of two complementary keys generated according to a chosen trapdoor one-way function (TOWF). Since its first implementation, asymmetric encryption has revolutionized our way of communicating as well as the safety of information transfer, and it is now widely used around the world for various purposes, especially in the field of online transaction security. The safety of the asymmetric-key scheme relies on the assumption that any known cryptographic attack using an efficient problem-solving algorithm will not be able to succeed in applying the inverse (decryption) function onto the cryptogram in a polynomial time without additional knowledge (secret information). The most-challenging aspect of creating a new asymmetric cryptographic algorithm is selecting a one-way function for encryption purposes and finding a trapdoor in its inverse. In this paper, the concept of public-key cryptography will be explained using the RSA algorithm as an example. In addition, the review of the most-important functions that are considered to be trapdoor one- -way functions will be conducted.

Thesis

Restricted

Bezpieczeństwo aplikacji mobilnych: komunikator z szyfrowaniem end-to-end

(Data obrony: 2017-02-14) Magier, Karol
Wydział Elektrotechniki, Automatyki, Informatyki i Inżynierii Biomedycznej

Thesis

Restricted

Blockchain na potrzeby dydaktyki i demonstracji działania

(Data obrony: 2020-01-21) Węgrzyn, Patryk; Frejek, Grzegorz; Radoń, Konrad
Wydział Informatyki, Elektroniki i Telekomunikacji

Thesis

Restricted

Blockchain na potrzeby dydaktyki i demonstracji działania

(Data obrony: 2020-01-21) Radoń, Konrad; Węgrzyn, Patryk; Frejek, Grzegorz
Wydział Informatyki, Elektroniki i Telekomunikacji

Thesis

Restricted

Blockchain na potrzeby dydaktyki i demonstracji działania

(Data obrony: 2020-01-21) Frejek, Grzegorz; Węgrzyn, Patryk; Radoń, Konrad
Wydział Informatyki, Elektroniki i Telekomunikacji

Doctoral Dissertation

Open Access

Cryptographic aspects of security analysis and network protocols improvements

(2010-05-27) (Data obrony: 2012) Kołodziejczyk, Marcin
Wydział Elektrotechniki, Automatyki, Informatyki i Elektroniki

The following Ph.D. Thesis describes the new proposal of secure protocol designed for remote function calls, called "Secure Remote Protocol" (SRP). First part is the analysis of existing network threats. It is this the complex review of known attacks, beginning from physical threats and finishing on nigh-level network protocols' vulnerabilities. Next chapter presents cryptographic algorithms used for assurance of confidentiality and data integrity. Cryptography is related to trust models implemented in protocols like SSH, SSL/TLS or Kerberos. Every of these models utilizes cryptoalgorithms in different way, peculiar for specific protocol. Along with the development of computer network, new solutions for software programmers were created. The examples are: RMI, PRC, CORBA, REST or SOAP. Fifth chapter contains description of mentioned solutions and its security assessment. Next, there is the design and description of proposal of the new protocol - SRP, designed for remote function calls. SRP proposal contains build-in security mechanisms. The integral part of this thesis are requirements and guidelines for secure protocols. These guidelines were addressed to SRP design and implementation. At the end, there is an implementation in Java language and description of results.