How to use in-sentence of “ciphertext”:
+ Some systems, however, use a cascade of layers of encryption in which case the ciphertext output of one encryption algorithm becomes the plaintext input to the next.
+ A message consisting of a single ASCII character would be encoded as “m” = 0, which produces a ciphertext of 0 no matter which values of “e” and “N” are used.
+ Such schemes are known also as asynchronous stream ciphers or ciphertext autokey.
+ If a ciphertext number becomes larger than 25 we wrap it to a value between 0-25.
+ Block ciphers must be used in ciphertext stealing or residual block termination mode to avoid padding, while stream ciphers eliminate this issue by operating on the smallest transmitted unit.
+ Early versions of the PKCS standard used constructions, which were later found vulnerable to a practical adaptive chosen ciphertext attack.
+ Then the ciphertext is.
Example sentences of “ciphertext”:
+ Here the plaintext message “attack at dawn” is combined by addition with the keystream “kjcngmlhylyu” and produces the ciphertext “kcvniwlabluh”.
+ Given a padded message “m”, the ciphertext “c”, is calculated byWe want to show this value is also congruent to “m”.
+ Such a network takes a block of the plaintext and the key as inputs, and applies several alternating “rounds” or “layers” of substitution boxes to produce the ciphertext block.
+ One tape contained the ciphertext in a continuous loop.
+ Formally, plaintext is information that is fed as an input to a coding process, while ciphertext is what comes out of that process.
+ In block ciphers, the S-boxes and P-Boxes are used to make the relation between the plaintext and the ciphertext difficult to understand.
+ Another approach is to mark the ciphertext with markers at regular points in the output.
+ In a non-adaptive attack, the attacker chooses the ciphertext or ciphertexts to decrypt in advance, and does not use the resulting plaintexts to inform their choice for more ciphertexts.
+ For example, a Caesar cipher can be solved using a single letter of corresponding plaintext and ciphertext to decrypt entirely.
+ The idea of self-synchronization was patented in 1946, and has the advantage that the receiver will automatically synchronise with the keystream generator after receiving “N” ciphertext digits, making it easier to recover if digits are dropped or added to the message stream.
+ Likewise, a single ASCII would always produce a ciphertext of 1.
+ Here the plaintext message "attack at dawn" is combined by addition with the keystream "kjcngmlhylyu" and produces the ciphertext "kcvniwlabluh".
+ Given a padded message "m", the ciphertext "c", is calculated byWe want to show this value is also congruent to "m".
+ And to decrypt we subtract the same keystream numbers from the ciphertext to get the plaintext.
+ A chosen-ciphertext attack is an attack model for cryptanalysis in which the cryptanalyst gathers information, at least in part, by choosing a ciphertext and obtaining its decryption under an unknown key.
+ In block ciphers, the S-Boxes are used to make the relation between the key and the ciphertext difficult to understand–Shannon’s property of confusion.
+ The ciphertext message contains all the information of the plaintext message, but cannot be read by human or computer without the proper mechanism to decrypt it.
+ Self-synchronizing stream ciphers is another technique that uses part of the previous “N” ciphertext digits to compute the keystream.
+ Afterwards he can decrypt the ciphertext by computing “D” for each “K”.
+ Moreover, because of this property, synchronous stream ciphers are very susceptible to active attacks — if an attacker can change a digit in the ciphertext, he might be able to make predictable changes to the corresponding plaintext bit; for example, flipping a bit in the ciphertext causes the same bit to be flipped in the plaintext.
+ The ability to obtain any amount of information from the underlying ciphertext is considered a success.