ccna as a career

ccna as a career.The characteristics of symmetric encryption algorithms are shown below: Symmetric secret algorithms are well known for their pre-shared key algorithms: Usually the key length is 80 or 256 bits; The sender and receiver must share a secret key; Since their algorithms are based on simple mathematical operations, they are fast (wire speed) to execute.Examples of symmetric encryption algorithms are DES, 3DES, AES, IDEA, RC2/4/5/6, and Blowfish.In the symmetric algorithm example, Alice and Bob have a padlock with the same key. These keys are exchanged before a secret message is sent. Alice writes a secret message, puts it in a small box, locks the padlock with her key, and later sends the box to Bobo When the box passes through the postal system, the message is safely locked inside the box. After Bob receives the box, he uses his own key to open the padlock to get the message. Bob can use the same box and padlock to send a secret reply to Alice.Asymmetric algorithmThe characteristics of the asymmetric encryption algorithm are shown below.IE symmetric encryption algorithms are well known for their public key algorithms; The usual key length is 512 or 4096 bits; The sender and receiver do not share the secret key; The algorithm is relatively slow to execute because it is more difficult to compute. Examples of asymmetric machine encryption algorithms are RSA, ElGamal, Elliptic Curve Encryption Algorithm, and DH.In the asymmetric algorithm example, Bob and Alice do not exchange keys before sending a secret message. Instead, Bob and Alice both have their own padlocks and their corresponding keys. When Alice wants to send a secret message to Bob, she must first contact Bob and ask him to open his padlock and send it to her. Bob sends the padlock, but leaves the key. After Alice receives the padlock, she writes the secret message and puts it in a . A box. She also opens her padlock and puts it in the box, but leaves the key. She then uses Bob's padlock to lock the box. When Alice locks the box, she can no longer open it because she does not have the key to the padlock. She sends the box to Bobo When the box is delivered in the mail system, no one can open the box. After Bob receives the box, he can use his own key to open the box to get a message from Alice. To send a secure reply, Bob puts his secret message in the box with his open padlock, locks the box again using Alice's padlock, and Bob sends the protected box back to Aliceo7.3.1.3 Symmetric EncryptionSymmetric (or secret key) encryption is the most common form of cryptography because the shorter key length speeds up execution. In addition, the symmetric