英和和英

a stopwatch that indicates times in a digital form

a cipher-key

Crack a code

a code that changes its key at every block or bit

break a code

a line of business dealing with secret codes

break the code

to decipher a code

the encryption of data for security purposes

write in cipher

a key on a typewriter keyboard, called a backspace key

a shrink-wrapped CD

to decipher a code―decode a message

a tool for making holes in tickets, called punch

a unit used for gene information, called codon

a secret key or password is required for decryption

the structure of a secret code

a code called Playfair cipher

cut recording tape

to cipher a message

to wire in cipher

the Visinel secret coding table

Please don't encrypt your file.

the roller on a typewriter against which the keys strike

a secret number that exchanges a character line by using the same key, called a block number

a standard code for a commercial document called {data cryptograph standard}

resetting password

a master key

a record gate

the key of D major