This article describes the online cloud computing course- public keys, private keys, and their differences. Both private and public keys are widely used for encryption and decryption. Therefore, it is very important to know both keys and their differences.
Public Key
This is an encryption technology that uses a key pair (public key and private key) for secure data communication. The key pair uses the public key to encrypt the plaintext and convert it to ciphertext, and the private key to decrypt the ciphertext and read the message.
The private key is passed to the recipient and the public key is made public. Public-key cryptography is also known as asymmetric cryptography. The public key can be shared without compromising the security of the private key. All asymmetric key pairs are unique, so messages encrypted with a public key can only be read by someone who has the corresponding private key. The paired keys are much longer than the keys used for symmetric encryption. Therefore, it is difficult to decrypt the private key from the public key. Many of us have heard of RSA, the most widely used asymmetric cryptographic algorithm today.
Public key encryption is slower than private key encryption. Private key cryptography uses a single common key to encrypt and decrypt messages, while public-key cryptography uses two different keys, both linked together by a complex mathematical process. increase. Therefore, it can be said that public-key cryptography takes a long time to encrypt and decrypt.
Public Key Application
1. Public Key Cryptography to encrypt the contents of cloud service to the emails to keep them confidential.
2. Asymmetric cryptography, or public-key cryptography, is also used by the Secure Socket Layer (SSL) protocol to create secure connections to websites in the cloud provider.
3. The public key is also used in blockchain and cryptography. For example, a key pair will be generated while a new cryptocurrency wallet is being set up.
4. Can be used to create digital signatures on operating system software such as Ubuntu, Red Hat Linux package distribution at data centres.
Private Key
With the Private Key, both parties use the same key (or private key). That is, the sender and receiver of the encryption/decryption technology in best cloud training online.
The sender uses the private key and encryption algorithm for encryption, and the receiver uses this key and decryption algorithm for decryption. In private key encryption/decryption technology, the algorithm used for encryption is the reverse of the algorithm used for decryption. This means that if the encryption algorithm uses a combination of addition and multiplication, the decryption algorithm uses a combination of subtraction and division.
With this type of encryption in devops online training at both the sender and the receiver use a single key while communicating or sending information. The sender uses this key to encrypt the plaintext and sends the encrypted text to the recipient over the communication channel. The recipient uses the same key to decrypt the encrypted text at the other end. When deciphering, he restores plaintext. The private key is known only between the two involved in the communication. The private key is created using the same mathematical algorithms used in the public key to create a strong paired binary sequence.
Public Key Vs Private Key
This is a rough description of public and private keys. Next, let's take a look at the comparison table of the two keys. Compare both keys based on some characteristics:
1. Private keys are faster than public keys. It's slower than the private key.
2. Use the same key (private key) and algorithm to encrypt and decrypt the message. Public key cryptography uses two keys. One is used for encryption and the other is used for decryption.
3. With private key encryption, the key is kept secret. Public-key cryptography keeps one of two keys secret.
4. The private key is symmetric because there is only one key called the private key. Public keys are asymmetric because there are two types of keys: private keys and public keys.
5. This encryption requires the sender and receiver to share the same key. This encryption does not require the sender and receiver to share the same key.
6. With this encryption, the key is secret. This encryption allows the public key to be made public and the private key to be kept secret.
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