cipher
A secret code used to hide the meaning of a message.
A system of secret writing that changes letters, numbers, or words so that only someone with the method or key can read the message.
A hidden message that you must solve to read.
A message, text, or puzzle written using a secret code.
In computer security, a cipher is the method that turns readable data into protected data and back again.
An algorithm used to encrypt and decrypt digital information, especially in computer security.
A person or thing that seems unimportant or has no real influence.
A person, organization, or thing that seems to have no real power, importance, or individuality.
A circle where hip-hop performers take turns rapping, beatboxing, or dancing.
An informal circle or gathering in which rappers, beatboxers, or dancers take turns performing, especially freestyle.
To change a message into a secret code.
To write or convert a message into a cipher; to encrypt or encode it.
In old-fashioned English, cipher can mean zero.
The numeral 0; a zero.
- Base: cipher
- Plural: cipher, ciphers
- Base: cipher
- 3rd Person Singular: ciphers
- Present Participle: ciphering
- Past: ciphered
block cipher
1fixed-block encryption cipher
A method that encrypts chunks of data of a fixed size.
- AES is a widely used block cipher.
- A block cipher needs a mode of operation to handle messages longer than one block.
- The system used a block cipher to encrypt stored records.
- AES is a block cipher.
- A block cipher works on blocks of data.
caesar cipher
1simple letter-shift cipher
A simple code that shifts every letter by the same number of places.
- Students often learn the Caesar cipher by shifting each letter three places.
- A Caesar cipher is easy to break because there are only a few possible shifts.
- The puzzle used a Caesar cipher, so B stood for E.
- We used a Caesar cipher in class.
- In this Caesar cipher, A becomes D.
cipher key
1key for a cipher
The information you need to make or read a coded message.
- The detective found the cipher key hidden inside the diary.
- Without the cipher key, the coded letter made no sense.
- The escape-room team needed a cipher key to read the final clue.
- We need the cipher key to read this note.
- The cipher key says 1 means A.
cipher suite
1set of security algorithms
A group of security methods that a browser and server agree to use.
- The server was configured to reject outdated cipher suites.
- During the handshake, the browser and server choose a compatible cipher suite.
- Security auditors recommended disabling several weak cipher suites.
- The server supports modern cipher suites.
- Old cipher suites can be unsafe.
ciphertext
1encrypted text or data
Data that has been changed into unreadable encrypted form.
- The program converts the password into ciphertext before storing it.
- Anyone who intercepted the file would see only ciphertext.
- The attacker had the ciphertext but not the key needed to decrypt it.
- Ciphertext is not easy to read.
- The app turns the message into ciphertext.
in cipher
1written in code
Written in a secret code.
- The letter was written in cipher and could not be read without the key.
- Several pages of the diary were in cipher.
- The ambassador sent the warning in cipher.
- The note is in cipher.
- They wrote the message in cipher.
stream cipher
1continuous-data encryption cipher
A method that encrypts data continuously instead of in fixed blocks.
- A stream cipher can be efficient for real-time communication.
- The protocol once relied on a stream cipher that is now considered weak.
- Unlike a block cipher, a stream cipher processes data continuously.
- A stream cipher works on a flow of data.
- Some stream ciphers are very fast.
substitution cipher
1code using symbol replacement
A simple code where each letter or group of letters in a message is always changed into another letter or group of letters.
- The Caesar cipher is a basic substitution cipher.
- In a substitution cipher, frequency analysis can help break the code.
- The puzzle used a simple substitution cipher to hide the message.
substitution cipher
1replacement-based cipher
A code that hides a message by replacing each letter or symbol with another one.
- The newspaper puzzle was a substitution cipher with a different symbol for every letter.
- Frequency analysis can help solve a simple substitution cipher.
- She created a substitution cipher for the escape-room clue.
- This substitution cipher uses numbers for letters.
- We solved the substitution cipher together.