What is encryption and decryption in networking?
Answers
Answer:
Definition of Encryption
Encryption is the process in which a sender converts the original information to another form and sends the resulting unintelligible message out over the network. The sender requires an encryption algorithm and a key to transform the plaintext (original message) into a ciphertext (encrypted message), it’s also known as enciphering.
Plaintext is the data that need to be protected during transmission. The ciphertext is the scrambled text produced as an outcome of the encryption algorithm for which a specific key is used. The ciphertext is not shielded. It flows on the transmission channel. The encryption algorithm is a cryptographic algorithm that inputs plain text and an encryption key and produces a ciphertext.
In conventional encryption methods, the encryption and decryption keys are same and secret. Conventional methods are broadly divided into two classes: Character level encryption and Bit level Encryption.
Character-level Encryption– In this method, encryption is performed at the character level. There are two common strategies for character-level encryption are substitutional and Transpositional.
Bit- level Encryption– In this technique, firstly data (such as text, graphics, audio, video, etc.) is divided into blocks of bits, then modified by encoding/ decoding, permutation, substitution, exclusive OR, rotation, and so on.
Definition of Decryption
Decryption inverts the encryption process in order to convert the message back to its real form. The receiver uses a decryption algorithm and a key to transform the ciphertext back to original plaintext, it is also known as deciphering.
A mathematical process utilized for decryption that generates original plaintext as an outcome of any given ciphertext and decryption key is known as Decryption algorithm. This process is the reverse process of the encryption algorithm.
The keys used for encryption and decryption could be similar and dissimilar depending on the type of cryptosystems used (i.e., Symmetric key encryption and Asymmetric key encryption).
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Answer:
Definition of Encryption
Encryption is the process in which a sender converts the original information to another form and sends the resulting unintelligible message out over the network. The sender requires an encryption algorithm and a key to transform the plaintext (original message) into a ciphertext (encrypted message), it’s also known as enciphering.
Plaintext is the data that need to be protected during transmission. The ciphertext is the scrambled text produced as an outcome of the encryption algorithm for which a specific key is used. The ciphertext is not shielded. It flows on the transmission channel. The encryption algorithm is a cryptographic algorithm that inputs plain text and an encryption key and produces a ciphertext.
In conventional encryption methods, the encryption and decryption keys are same and secret. Conventional methods are broadly divided into two classes: Character level encryption and Bit level Encryption.
Character-level Encryption– In this method, encryption is performed at the character level. There are two common strategies for character-level encryption are substitutional and Transpositional.
Bit- level Encryption– In this technique, firstly data (such as text, graphics, audio, video, etc.) is divided into blocks of bits, then modified by encoding/ decoding, permutation, substitution, exclusive OR, rotation, and so on.
Definition of Decryption
Decryption inverts the encryption process in order to convert the message back to its real form. The receiver uses a decryption algorithm and a key to transform the ciphertext back to original plaintext, it is also known as deciphering.
A mathematical process utilized for decryption that generates original plaintext as an outcome of any given ciphertext and decryption key is known as Decryption algorithm. This process is the reverse process of the encryption algorithm.
The keys used for encryption and decryption could be similar and dissimilar depending on the type of cryptosystems used (i.e., Symmetric key encryption and Asymmetric key encryption).