under this measure coal cost less than $ 0 01 per kwh in comparison a barrel of oil at $ 70 barrel produces 1700 kwh at a cost approximately $ 0 05 per kwh let s provide some measures to understand energy costsince coal oil and gas can be measured on a cost per kwh we should measure solar costs on a kwh basis some of the considerations for a solar energy system include the 20 to 30 year lifespan of the system and the hours of available sunlight
Ciphertext is also known as encrypted or encoded information because it contains a form of the original plaintext that is unreadable by a human or computer without the proper cipher to decrypt it.Decryption, the inverse of encryption, is the process of turning ciphertext into readable plaintext.Ciphertext is not to be confused with codetext because the latter is a result of a code, not a cipher.oth Alice and Bob must know the choice of key, , or else the ciphertext is useless. Once the message is encrypted as ciphertext, Alice can safely transmit it to Bob (assuming no one else knows the key). In order to read Alice's message, Bob must decrypt the ciphertext using which is known as the decryption cipher, .
In cryptography, a cipher (or cypher) is an algorithm for performing encryption or decryption â a series of well-defined steps that can be followed as a procedure. An alternative, less common term is encipherment. In non-technical usage, a âcipherâ is the same thing as a âcodeâ; however, the concepts are distinct in cryptography.