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How many different keys will be required to give four people the ability to encrypt and decrypt the message using a symmetric cryptography algorithm?
ONEAnswer Explanation: Only one key would be required for everyone to be able to encrypt and decrypt the message. Symmetric cryptography uses the same "shared secret" key for encrypting and decrypting a message. A message encrypted using a symmetric encryption algorithm can be decrypted by anyone with the key. For this reason it is very important to ensure that the key is protected from unauthorized use. One of the primary security issues surrounding the use of symmetric cryptography is the method used to transport the key to users who need it, as most forms of communication are susceptible to eavesdropping.
What is secret key cryptography?
In secret key cryptography, a single key is used for both encryption and decryption. The sender uses the key (or some set of rules) to encrypt the plaintext and sends the cipher text to the receiver. The receiver applies the same key to decrypt the message and recover the plaintext. Because a single key is used for both functions, secret key cryptography is also called symmetric encryption.
What is symmetric cryptography?
There are two general types of modern cryptography; symmetric cryptography and asymetric (also known as public key) cryptography. Symetric crypto is where both sides have the same shared encryption key, and that key is used to both encrypt and also decrypt any encrypted information. Symmetric crypto is more efficient (faster) than asymmetric crypto, but asymetric crypto works without having to share a key.
What does ciphered mean?
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.
What is secret key?
In secret key cryptography, a single key is used for both encryption and decryption. The sender uses the key (or some set of rules) to encrypt the plaintext and sends the cipher text to the receiver. The receiver applies the same key to decrypt the message and recover the plaintext. Because a single key is used for both functions, secret key cryptography is also called symmetric encryption.
Compare public key cryptography and Symmetric key cryptography?
In public key cryptography there are two parts: 1) secret part 2) public part ,in order for p1 to send p2 a message ,p1 first need to obtain p2's public key and using this key encrypts the message then p2 using his secret key decrypts the message. And in private key cryptograhy there is only one key so in order for p1 to send a message to p2, p1 should firstly ask p2 for his key then encrypt the message using that key and then p2 uses the same key to decrypt the message.
What key is often used to securely distribute symmetric algorithm keys?
The key commonly used to securely distribute symmetric algorithm keys is the asymmetric encryption key, often derived from public-key cryptography. In this method, a sender uses the recipient's public key to encrypt the symmetric key, which can then be safely transmitted over insecure channels. Only the recipient, possessing the corresponding private key, can decrypt the message to retrieve the symmetric key. This approach ensures confidentiality and secure key exchange.
How does PGP encyrption work?
PGP (Pretty Good Privacy) encryption works by using a combination of symmetric and asymmetric encryption techniques. When a user wants to send a secure message, PGP generates a random symmetric key to encrypt the message. This symmetric key is then encrypted using the recipient's public key before sending the message. The recipient can use their private key to decrypt the symmetric key, which can then be used to decrypt the original message.
What are the steps involved in symmetric cryptography Also explain key management in conventional cryptography using some example?
following steps are involved in symmetric cryptography 1- sender creates a ciphertext message by encrypting the plain text message with a symmetric encryption algorithm and a shared key. 2- the sender sends the ciphertext message to the recipient. 3- the recipient decrypts the ciphertext message into plain text with a shared key.
What is a procedure for encrypting and decrypting message?
A common procedure for encrypting and decrypting messages involves using symmetric or asymmetric encryption algorithms. In symmetric encryption, the sender and receiver share a secret key; the sender uses this key to encrypt the message, and the receiver uses the same key to decrypt it. In asymmetric encryption, a pair of keys (public and private) is used; the sender encrypts the message with the receiver's public key, and only the receiver can decrypt it with their private key. Implementing these methods ensures that the message remains confidential and secure during transmission.
What is a characteristic of public key cryptography?
If data is encrypted with the public key, only the private key can decrypt itAnswer Explanation: Public key encryption uses an asymmetric algorithm, which uses a public key and private key combination for the encryption and decryption process. If data is encrypted with the public key, only the private key can decrypt the data. The public key cannot decrypt a message that was encrypted with the public key. Alternatively, if data is encrypted with the private key, only the public key can decrypt the data.
What is the difference between Private key cryptography and public key cryptography?
Public key encryption refers to a type of cypher or code architecture known as public key cryptography that utilizes two keys, or a key pair), to encrypt and decrypt data. One of the two keys is a public key, which anyone can use to encrypt a message for the owner of that key. The encrypted message is sent and the recipient uses his or her private key to decrypt it. This is the basis of public and private key encryption.
