Cryptography

CRYPTOGRAPHY

1. Cryptography is the technique message from a non-readable format back to a readable format without knowing how they initially converted from readable format to non-readable format.

2. Cryptography is heavily based on mathematical theory and computer science practice, cryptographic algorithms are designed around computational hardness assumptions, making such algorithms hard to break in practice by any adversary.

3. It is theoretically possible to break such a system, but it is infeasible to do so by any known practical means.

4. These schemes are therefore termed computationally secure; theoretical advances, e.g., improvements in integer factorization algorithms, and faster computing technology require these solutions to be continually adapted.

5. There exist information-theoretically secure schemes that provably cannot be broken even with unlimited computing power—an example is the one-time pad—but these schemes are more difficult to implement than the best theoretically breakable but computationally secure mechanisms.

6. Cryptography or cryptology (from Greek κρυπτός kryptós, "hidden, secret"; and γράφειν graphein, "writing", or -λογία -logia, "study", respectively) is the practice and study of techniques for secure communication in the presence of third parties called adversaries.

7. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages; various aspects in information security such as data confidentiality, data integrity, authentication, and non-repudiation are central to modern cryptography.

8. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, andelectrical engineering.

9. Applications of cryptography include ATM cards, computer passwords, and electronic commerce.

10. Modern cryptography is heavily based on mathematical theory and computer science practice; cryptographic algorithms are designed around computational hardness assumptions, making such algorithms hard to break in practice by any adversary.

11. It is theoretically possible to break such a system, but it is infeasible to do so by any known practical means.

12. The growth of cryptographic technology has raised a number of legal issues in the information age.

13. Cryptography's potential for use as a tool for espionage and sedition has led many governments to classify it as a weapon and to limit or even prohibit its use and export.

14. In some jurisdictions where the use of cryptography is legal, laws permit investigators to compel the disclosure of encryption keys for documents relevant to an investigation

15. Cryptography also plays a major role in digital rights management andcopyright infringement of digital media.

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