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Questions and Answers
What is the primary focus of cryptography?
What is the primary focus of cryptography?
- Studying techniques for secure communication (correct)
- Developing algorithms for data compression
- Analyzing vulnerabilities in computer systems
- Creating protocols for network optimization
What is the main difference between symmetric-key and asymmetric-key cryptography?
What is the main difference between symmetric-key and asymmetric-key cryptography?
- The speed of encryption and decryption
- The level of security provided
- The number of keys used for encryption and decryption (correct)
- The type of encryption algorithms used
What is the purpose of hashing in cryptography?
What is the purpose of hashing in cryptography?
- To encrypt data
- To verify the integrity of data (correct)
- To digitalize signatures
- To decrypt data
Which cryptographic algorithm is commonly used for digital signatures?
Which cryptographic algorithm is commonly used for digital signatures?
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What is the decentralized, distributed ledger used in cryptocurrencies called?
What is the decentralized, distributed ledger used in cryptocurrencies called?
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What was the first decentralized cryptocurrency, launched in 2009?
What was the first decentralized cryptocurrency, launched in 2009?
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Study Notes
What is Crypto?
- Crypto, short for cryptography, refers to the practice and study of techniques for secure communication in the presence of third-party adversaries.
- It involves the use of algorithms and protocols to protect the confidentiality, integrity, and authenticity of messages.
Types of Cryptography
- Symmetric-key cryptography: uses the same secret key for both encryption and decryption.
- Asymmetric-key cryptography: uses a pair of keys, one public and one private, for encryption and decryption.
Cryptographic Techniques
- Encryption: the process of converting plaintext into ciphertext.
- Decryption: the process of converting ciphertext back into plaintext.
- Hashing: a one-way function that takes input data of any size and returns a fixed-size string of characters.
- Digital signatures: used to authenticate the sender of a message and ensure the integrity of the message.
Cryptographic Algorithms
- AES (Advanced Encryption Standard): a symmetric-key block cipher used for encryption.
- RSA (Rivest-Shamir-Adleman): an asymmetric-key algorithm used for encryption and digital signatures.
- SHA (Secure Hash Algorithm): a family of hash functions used for data integrity and authenticity.
Cryptocurrencies
- Blockchain: a decentralized, distributed ledger that records transactions across a network of computers.
- Bitcoin: the first decentralized cryptocurrency, launched in 2009.
- Altcoins: alternative cryptocurrencies that are not Bitcoin, such as Ethereum, Litecoin, and others.
Cryptographic Applications
- Secure online transactions: crypto is used to secure online transactions, such as online banking and e-commerce.
- Secure communication: crypto is used to secure communication, such as HTTPS and VPNs.
- Digital identity: crypto is used to secure digital identities, such as passports and identity cards.
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Description
Learn about the basics of cryptography, including types, techniques, algorithms, and applications. Understand how cryptography is used to secure online transactions, communication, and digital identities.
