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Cryptography and Network Security, 1st Edition

Cryptography and Network Security, 1st Edition
English | 2022 | ISBN: 9788770224079| 324 pages | True PDF | 8.34 MB
Starting with the historical evolution of computer and communications networks and their security, the book then arrives at the main definitions of cryptography and network security. Next, the basics of information theory, how to measure information, the information associated with a certain source are also discussed. Source codes are presented, along with the concepts of information transmission, joint information, conditional entropy, mutual information and channel capacity. Computer networks are discussed, including the main protocols and network architectures, and the important TCP/IP protocol. Network security, a topic intrinsically connected to computer networks and the Internet, is presented, along with information about basic hacker attacks, alternatives to prevent attacks, data protection and secure protocols. The information theoretical aspects of cryptography are described including the hash function. An appendix includes a review of probability theory. Illustrations and graphics will help the reader understand the theory.

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Cosmos, Liturgy, and the Arts in the Twelfth Century Hildegard's Illuminated Scivias

Cosmos, Liturgy, and the Arts in the Twelfth Century Hildegard's Illuminated Scivias
English | 2022 | ISBN: 1512823074 | 393 pages | True PDF EPUB | 267.84 MB
In Cosmos, Liturgy, and the Arts in the Twelfth Century , Margot E. Fassler takes readers into the rich, complex world of Hildegard of Bingen's Scivias (meaning "Know the ways") to explore how medieval thinkers understood and imagined the universe. Hildegard, renowned for her contributions to theology, music, literature, and art, developed unique methods for integrating these forms of thought and expression into a complete vision of the cosmos and of the human journey. Scivias was Hildegard's first major theological work and the only one of her writings that was both illuminated and copied by scribes from her monastery during her lifetime. It contains not just religious visions and theological commentary, but also a shortened version of Hildegard's play Ordo virtutum ("Play of the virtues"), plus the texts of fourteen musical compositions.

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