What is the name of the attack where the attacker obtains the ciphertexts corresponding to a set of plaintexts of his own choosing?

Chosen plaintext

https://en.wikipedia.org/wiki/Chosen-plaintext_attack

A chosen-plaintext attack (CPA) is an attack model for cryptanalysis which presumes that the attacker

can obtain the ciphertexts for arbitrary plaintexts. The goal of the attack is to gain information that

reduces the security of the encryption scheme.

Incorrect answers:

Differential cryptanalysis - is a general form of cryptanalysis applicable primarily to block ciphers, but

also to stream ciphers and cryptographic hash functions. In the broadest sense, it is the study of how

differences in information input can affect the resultant difference at the output. In the case of a

block cipher, it refers to a set of techniques for tracing differences through the network of

transformation, discovering where the cipher exhibits non-random behavior, and exploiting such

properties to recover the secret key (cryptography key).

Known-plaintext attack - (KPA) is an attack model for cryptanalysis where the attacker has access to

both the plaintext (called a crib), and its encrypted version (ciphertext). These can be used to reveal

further secret information such as secret keys and code books.

Kasiski examination - (also referred to as Kasiski's test or Kasiski's method) is a method of attacking

polyalphabetic substitution ciphers, such as the Vigenère cipher. It was first published by Friedrich

Kasiski in 1863, but seems to have been independently discovered by Charles Babbage as early as

1846. In polyalphabetic substitution ciphers where the substitution alphabets are chosen by the use

of a keyword, the Kasiski examination allows a cryptanalyst to deduce the length of the keyword.

Once the length of the keyword is discovered, the cryptanalyst lines up the ciphertext in n columns,

where n is the length of the keyword. Then each column can be treated as the ciphertext of a

monoalphabetic substitution cipher. As such, each column can be attacked with frequency analysis.