Caesar Cipher

25! = 2^84

You mean your plaintext message the yes you can but you have to separate it with an x when you put letters in pairs, but in a key no.

The Playfair Cipher is useful because it requires no special equipment to use. However, it was invented in 1854 and is antiquated and rarely used in the present.

Giles Playfair's birth name is Giles William Playfair.

The Playfair is susceptible to digraph frequency analysis. Separate the plaintext into digraphs and do a frequency count. Once you've found that, compare the digraph frequency of the ciphertext to the digraph frequency of English and see how it might fit in to the Playfair grid. An intimate understanding of how letters in the grid relate to each other and implications of how the grid is affected by correspondences between the ciphertext and plaintext is critical. I'll try to post a help video on YouTube in the near future.

Giles Playfair was born in 1910.

Giles Playfair died in 1996.

Jocelyn Playfair was born in 1904.

Jocelyn Playfair died in 1996.

William Playfair died in 1823.

William Playfair was born in 1759.

Edward Playfair was born in 1909.

Edward Playfair died in 1999.

John Playfair died in 1819.

John Playfair was born in 1748.

James Playfair was born in 1755.

James Playfair died in 1794.

Tom Playfair was created in 1890.

Henry Playfair was born in 1983.

Tom Playfair has 255 pages.

The ISBN of Tom Playfair is 978-0895556707.

Judy Playfair was born on September 14, 1953.

Judy Playfair was born on September 14, 1953.

Dylan Playfair is 5' 10 1/2".

Guy Lyon Playfair was born in India.

John Playfair Price died in 1988.

John Playfair Price was born in 1905.

Patrick Playfair died on 1974-11-23.

Patrick Playfair was born on 1889-11-22.

William Henry Playfair died in 1857.

William Henry Playfair was born in 1790.

I. S. O. Playfair was born in 1894.

I. S. O. Playfair died in 1972.

James Playfair - businessman - died in 1937.

Hugh Lyon Playfair died in 1861.

Hugh Lyon Playfair was born in 1787.

Jim Playfair was born on 1964-05-22.

Hi, I would say it is more than 120

It is. If my reasoning is correct, there are 360,000 unique ciphers. My reasoning is this: when i/j is counted as one letter and repetition is not allowed (as in Playfair), there are 25*24 = 600 possible digrams. Since each digram corresponds to one of those unique digrams, there are 600^2 = 360,000 unique Playfair ciphers (one should probably actually use 359,999 because one of the "ciphers" maps each digram to itself).

Arthur Playfair was born on October 20, 1869, in India.

Robert Smith Playfair has written:

'Fuller at Harvard'

J. Playfair McMurrich was born on 1859-10-16.

J. Playfair McMurrich died on 1939-02-09.

Kate Playfair has written:

'Now we are old'

Judy Playfair is 57 years old (birthdate: September 14, 1953).

Nigel Playfair was born on July 1, 1874, in London, England, UK.

Nigel Playfair died on August 19, 1934, in London, England, UK.

Jessie Playfair Bickford has written:

'For this hour and other poems'

Mark Playfair has written:

'Apartheid is not a game' -- subject(s): Apartheid, Relations

Thomas Playfair Ward has written:

'The right to live'

'The clutches of circumstances'