Fundamentals of Cryptography

Front

What are the two main parts of Cryptology?

Back

Cryptography and Cryptanalysis.

Front

What is Cryptography?

Back

The art and science of creating secret codes.

Front

What is Cryptanalysis?

Back

The study of cryptographic algorithms and the breaking of secret codes.

Front

What is an Exhaustive Key Search?

Back

An attack method where an attacker tries all possible keys to find the correct one.

Front

What is required to prevent an Exhaustive Key Search?

Back

A cryptosystem must have a large keyspace.

Front

What is Known-Plaintext Analysis (KPA)?

Back

An attack where some plaintext-ciphertext pairs are known, allowing the attacker to map them to find the encryption key.

Front

What is Chosen-Plaintext Analysis (CPA)?

Back

An attack where the attacker chooses random plaintexts and obtains the corresponding ciphertexts to find the encryption key.

Front

What is Ciphertext-Only Analysis (COA)?

Back

An attack where only ciphertext is known, and the attacker tries to find the corresponding encryption key and plaintext.

Front

What is a Man-In-The-Middle (MITM) attack?

Back

An attack where the attacker intercepts the message/key between two communicating parties.

Front

What is a Side-channel attack?

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An attack based on information obtained from the physical implementation of the cryptographic system.