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How many effectively unique keys does the playfair cipher have?
Wiki User
∙ 13y ago
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).
Wiki User
∙ 13y ago
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Why the number matrix in phone is of 4x3?
NOT QUITE AN ANSWER I don't know why, from a historical perspective. Possibly because it's the simplest way to arrange the keys using the tone dialing scheme. The individual keys' dialing tones are created by mixing two tones. There are three tones for the columns, and four for the rows. Each key makes a predefined combination tone.
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How many possible keys does the Playfair cipher have?
25! = 2^84
What actors and actresses appeared in Judged by Appearances - 1916?
The cast of Judged by Appearances - 1916 includes: Nelson Keys Arthur Playfair
What is the diffie-hellman cipher?
Diffie-Hellman is not as much a cipher as a means of securing exchanging keys. You would use it to securely notify someone else of a symmetric shared key that you both would use for encrypting data. Think of it as more a key exchange method utilizing public and private keys than an actual cipher methodology.
How many primary keys can a table have?
A table can have only one primary key. But, it can have multiple unique keys.
Which is easier to break the cipher used by an Enigma machine or a Caesar cipher?
The Caesar cipher is far more easier to break, as it consists of a single shift operation with a total number of 25 keys. Caeser can be cracked within less than a second by brute force (trying all possible keys). For the enigma machine you have to know which rotors are being used in which order, the initial rotor position, the ring position and the plugboard configuration. With cryptoanalytic approaches Enigma can be cracked as well in decent time. Nevertheless the key space (amount of possible keys) is so large, that simple brute forcing will take a while.
What is unique about a Clavinova CVP digital piano?
The weight of the keys is what is unique about the Clavinova CVP digital piano. Even though it is a digital piano, the keys make it sound like it is a grand piano.
Candidate key and primary key differnece?
All Primary keys are definitely Candidate Keys. A Candidate key is one which can be used as a Primary key that is not null and unique. That is one of the candidate keys can be chosen as a primary key.A Candidate key is a Unique Key and it can be used to find out any particular Tuple (row) in a table. The following are the differences between A Candidate key and a Primary Key: 1) A Unique key can be null but not a Primary key 2) On a table we can have only 1 primary key but 'N' number of unique keys.
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Yes, it's. But it's still easy to break. no there is no different
The purpose of the primary key in building the relationship between tables?
primary keys are unique
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A primary key is a unique identifier for a record in a table and ensures each record is uniquely identified. A foreign key establishes a relationship between two tables by referencing the primary key in another table. It enforces referential integrity by ensuring that the values in the foreign key column correspond to values in the primary key column of another table.
How many keys are required for ten people to communication via a cipher?
n(n-1)/2 is the answer. Hence; 10(10-1)/2= 45 shared pairs. but this applies to symmetric only.
