Analýza implementace kryptografických elementů v jazyce Java

This thesis deals with implementations of cryptographic elements (hash functions, symmetric and asymmetric ciphers and digital signature algorithms) in the Java programming language. These elements are represented by SHA-2, AES, ChaCha, RSA (both encryption and digital signatures), DH a ECDSA algorithms. First, an introduction to cryptography is presented. Subsequently, the algorithms tested are described from a theoretical standpoint, including recommendations for their real world use. Following is an overview of Java’s cryptographic architecture and capabilities. An application used to test and analyze the performance of implementations of those algorithms is created. After that, the structure of the application is described, followed by testing methodology. Detailed specifications of tested devices and algorithms are presented afterwards. Benchmarks are performed on a variety of hardware specifications – personal computer, smartphone and Raspberry Pi. Finally, results are analyzed with respect to differences between cryptographic providers, performance among tested devices and algorithms.