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 cryptanalysis are the two sides of cryptology.
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- 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. [...]...
- 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 [...]...
- 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 [...]...
- 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 [...]...
- Substitution and Transposition Ciphers
Substitution and transposition ciphers are two categories of ciphers used in classical cryptography. Substitution and transposition differ in how chunks of the message are handled by the encryption process. Substitution ciphers Substitution ciphers encrypt plaintext by changing the plaintext one piece at a time. The Caesar Cipher was an early substitution cipher. In the Caesar [...]...
Kindly provide the solution to:
If p = 11 and q = 19, use the BBS algorithm to produce the k-th bit if xk-1 = 100. Explain how you got your answer.
Thank you in advance!
D. Moh