Challenge "Double Column Transposition Reloaded — Part 2" ¶
By: admin on Dec. 11, 2013, 8:11 p.m.
The double columnar transposition is considered to be one of the best manual encryption systems. This sequence considers vulnerabilities that have been used to solve the corresponding level X challenge. The three challenges of the sequence have an increasing difficulty. In the second part two interleaved English texts have been encrypted with random keys.