repeated-key encryption

noun

UK /rɪˈpiːtɪd kiː ɪnˈkrɪpʃən/

US /rɪˈpiːtɪd kiː ɪnˈkrɪpʃən/

A way of hiding a message where the same secret key is used again and again.

The old system used repeated-key encryption, so attackers could compare patterns and guess the key.

SYNONYMS

key reuse reused-key cipher fixed-key encryption static-key encryption

RELATED WORDS

cryptography cipher encryption key plaintext ciphertext

OTHER MEANINGS

2. A weak encryption practice where reusing one key leaks patterns in the data.

Repeated-key encryption made the two messages easy to crack together.

3. A teaching example in cryptography showing why fresh keys matter.

The lesson on repeated-key encryption showed how a reused key can be broken.

4. A mode of operation that applies the same key to every block of data.

Their repeated-key encryption scheme applied one key to all the blocks.