Both a key and a cipher are required. Many are available, and range from quick and easy to use (but have little security), to relatively secure simple relatively simple systems, to those that absolutely cannot be broken.
You could use the hashlib module and encrypt your string into MD5 or SHA.
This happens when you encrypt the message.
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.
Yes
Yes. There are many ciphers but any time information is encrypted, some cipher must be used.
I use TrulyMail because it has encryption built in. However, in Thunderbird, you can use enigmail as an add-on.
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.
You can use the Encrypt4all program or File Off program from this site: www.encrypt4all.comYou could also see these other questions which are quite similar:How_do_you_encrypt_a_messageWhat_is_needed_to_encrypt_a_message
You can encrypt pictures using the Encrypt4all program.
The past tense of encrypt is encrypted.
"Encrypt" in Tagalog is "enkripto" or "isalansan ang mga datos."
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.