Yes. There are many ciphers but any time information is encrypted, some cipher must be used.
Yes, always. Some programs automatically choose the cipher for you so you don't always have to make a decision but a cipher is always used.
In cryptography a cipher is a code used to encrypt or decrypt a coded message. The cipher is the "key" that unlocks the message. So a message (or computer file) that has been encryption coded has been ciphered and must be decoded (deciphered) before it can be read.
Hill Cipher is a cryptographic algorithm to encrypt and decrypt an alphabetic text. In this cipher, each letter is represented by a number (eg. A = 0, B = 1, C = 2). To encrypt a message, each block of n letters (considered as an n -component vector) is multiplied by an invertible n × n matrix, against modulus 26.
cipher
The command 'cipher' calls a program that is integrated with Windows that can encrypt-decrypt files.
This answer depends on who is sending the information in a secure manner. If confidentiality is required, then the public key of the receiver is used to encrypt the message. If integrity is desired then your private key would be used to encrypt the message.
Cipher
The Cipher Message - 1913 was released on: USA: 1 December 1913
The cipher made the intent of the message difficult to understand.
You could use the hashlib module and encrypt your string into MD5 or SHA.
A symmetric cipher means that the key is the same for scrambling and unscrambling the data. Symmetric = same
This happens when you encrypt the message.