64. What characteristic of Digital Encryption Standard (DES) used in Electronic Code Book (ECB) mode makes it unsuitable for long messages?

Вариант ответа 1 - A. Block fragmentation causes message cipher instability.

Вариант ответа 2 - B. Weak keys will produce symmetrical message holes.

Вариант ответа 3 - C. Each message block produces a single cipher text block.

Вариант ответа 4 - D. Repeated message blocks produce repeated cipher text blocks.