Passwords and Ciphers

Welcome to Passwords and Ciphers Blog.

In computing, a password is a word or string of characters that is entered, often along with a user name, into a computer system to log in or to gain access to some resource. Passwords are a common form of authentication. Full security requires that the password be kept secret from those not allowed access.

In cryptography, a cipher (or cypher) is an algorithm for performing encryption and decryption — a series of well-defined steps that can be followed as a procedure. An alternative term is encipherment. In non-technical usage, a “cipher” is the same thing as a “code”; however, the concepts are distinct in cryptography. In classical cryptography, ciphers were distinguished from codes. Codes operated by substituting according to a large codebook which linked a random string of characters or numbers to a word or phrase. For example, “UQJHSE” could be the code for “Proceed to the following coordinates”. When using a cipher the original information is known as plaintext, and the encrypted form as ciphertext. The ciphertext message contains all the information of the plaintext message, but is not in a format readable by a human or computer without the proper mechanism to decrypt it; it should resemble random gibberish to those not intended to read it.

In the blog, you will find a Theory about Passwords or Ciphers. For example, Caesar Cipher, the blog will tell you about the History, Encryption, Decryption, or Cracking the Cipher.