Two-party password in four-party password

Two-party ciphers use fewer matrices than four-party ciphers.

The method of obtaining the encryption matrix is the same as that of the four-party cipher.

For example, using "example" and "keyword" as keys to encrypt lp. First find the position of the first letter (L) in the upper matrix, and then find the position of the second letter (D) in the lower matrix:

Afternoon eastern time.

Cost and freight price

Gao haijie

Not included

U V W Y Z

K E Y W O

R&D Bureau

ICJ

I mean,

Television X Z

Find the letters with the first letter in the same row and the second letter in the same column in the upper matrix; In the matrix below, find the letters with the first letter in the same column and the second letter in the same row. These two letters are the result of encryption:

Afternoon eastern time.

Cost and freight price

Gao haijie

Not included

U V W Y Z

K E Y W O

R&D Bureau

ICJ

I mean,

Television X Z

Help me encrypt results:

He helped me.

He described XW

The weakness of this encryption method is that if two words are in the same column, the original letters are used, for example, he is encrypted into him. About 20% of the content was exposed.