Known Ciphertext Attack
A known ciphertext attack is an an attack where the cryptanalyst only has access to encrypted ciphertext.
A known ciphertext attack is the easiest of the common cryptanalysis attacks to mount, because is requires the least amount of control over the encryption device.
Conversely, the known ciphertext is the most difficult of the common methods of cryptanalysis to execute successfully, because so little knowledge is known to begin with.
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- Plaintext and Ciphertext
Plaintext Plaintext, also known as cleartext, is usable data. It is data either before encryption or after successful decryption. Ciphertext Ciphertext is encrypted data. Plaintext can not be deduced from properly encrypted ciphertext. Here is a brief message in ciphertext: pgAAADP1wJU8OtQgiOPV9b+EyS6Iz6acuGAKrm1 GEcI4eJJolT68cOb1H/o/PxZ8 nYIs0UupT+0= =7mu0 Encryption and Decryption Encryption is the process of turning plaintext into [...]...
- Cryptanalysis
Cryptanalysis is the science of making encrypted data unencrypted. Cryptanalysts Practitioners of cryptanalysis are known as cryptanalysts. Cryptanalysis in Context A cryptographer will use cryptography to convert plaintext into ciphertext and a cryptanalyst will use cryptanalysis to attempt to turn that ciphertext back into plaintext. Both the cryptographer and the cryptanalyst are cryptologists. Cryptography and [...]...
- Known Plaintext Attack
A known plaintext attack is an attack where the cryptanalyst has access to the ciphertext and the plaintext of one or more pieces of data. A known plaintext attack is somewhat easier to mount than a chosen plaintext attack, because a known plaintext attack does not require the cryptanalyst to be able to feed data [...]...
- Chosen Plaintext Attack
A chosen plaintext attack is an attack where the cryptanalyst is able to define his own plaintext, feed it into the cipher, and analyze the resulting ciphertext. Mounting a chosen plaintext attack requires the cryptanalyst to be able to send data of his choice into the device which is doing the encryption, and it requires [...]...
- Cryptology
Cryptology Cryptology is the science which incorporates both cryptography and cryptanalysis. Cryptologists Practitioners of cryptology are known as cryptologists. Cryptology in Context A cryptographer will use cryptography to convert plaintext into ciphertext and a cryptanalyst will use cryptanalysis to attempt to turn that ciphertext back into plaintext. Both the cryptographer and the cryptanalyst are cryptologists. [...]...
what are the techniques and methods used to break the ciphertext attack only?