cipher

暗号、暗号方式

仕組みを知る人だけが読めるように、メッセージを変える方法。

やさしい英語で： A way of changing a message so that only someone who knows the system can understand it.

• They used a cipher to send messages.
• Can you break this simple cipher?
• Each letter was replaced using the same cipher.

類義語： code

よく使う表現： simple cipher, substitution cipher, break a cipher

暗号アルゴリズム、暗号方式

文字やコンピューターのデータを秘密の形に変える数学的な仕組み。

やさしい英語で： A mathematical system that changes letters or computer data into a secret form.

• This cipher protects the stored data.
• The software uses a modern block cipher.
• Researchers found a weakness in the cipher.

類義語： encryption algorithm

よく使う表現： block cipher, stream cipher, public-key cipher

数字

数を表すために書く記号。

やさしい英語で： A written sign representing a number.

• One cipher was missing from the total.
• The faded cipher looked like a three.
• He copied the ciphers into a column.

類義語： digit, numeral, figure

よく使う表現： single cipher, written cipher

暗号化する

他人に読まれないよう、メッセージを秘密の形に変える。

やさしい英語で： To change a message into a secret form so that others cannot read it.

• They ciphered the message before sending it.
• She learned to cipher secret reports.
• The clerk ciphers every military dispatch.

類義語： encode, encrypt, encipher

反対語： decipher, decrypt

よく使う表現： cipher a message, cipher the text