Cryptography is the practice and study of techniques for secure communication in the presence of third parties (called adversaries). More generally, it is about constructing and analyzing protocols that overcome the influence of adversaries and that are related to various aspects in information security such as data confidentially, data integrity, authentication, and non- repudiation. Modern cryptography intersects the disciplines of mathematics, computer science, and electrical engineering. Applications of cryptography include ATM cards, computer passwords, and electronic commerce. Basic example to understand how cryptography works is given below:

Which of the following choices true about cryptography?

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Cryptography is the practice and study of techniques for secure communication in the presence of third parties (called adversaries). More generally, it is about constructing and analyzing protocols that overcome the influence of adversaries and that are related to various aspects in information security such as data confidentially, data integrity, authentication, and non- repudiation. Modern cryptography intersects the disciplines of mathematics, computer science, and electrical engineering. Applications of cryptography include ATM cards, computer passwords, and electronic commerce. Basic example to understand how cryptography works is given below:

Which of the following choices true about cryptography?

Accepted Answer

C. Secure Sockets Layer (SSL) use the asymmetric encryption both (public/private key pair) to SSL/TLS employs asymmetric (public/private key) cryptography during the handshake phase to authenticate the server and securely exchange a symmetric session key. This hybrid approach uses the security of public-key cryptography for key establishment before switching to faster symmetric encryption for bulk session data transfer.

Answer

A. Algorithm is not the secret; key is the secret. While Kerckhoffs's principle does state that the algorithm is not the secret and only the key is, this makes choice A a true statement rather than the best answer identifying a specific technology's cryptographic behavior.

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B. Public-key cryptography, also known as asymmetric cryptography, public key is for decrypt, In public-key cryptography the public key is used for encryption and the private key for decryption - not the reverse as implied by this choice.

Answer

D. Symmetric-key algorithms are a class of algorithms for cryptography that use the different Symmetric-key algorithms use the same key for both encryption and decryption; using different keys for each operation is the defining trait of asymmetric, not symmetric, algorithms.

Cryptography is the practice and study of techniques for secure communication in the presence of third parties (called adversaries). More generally, it is about constructing and analyzing protocols th

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