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in synchronous communication data will be transmitted with clock and in asynchronous only start and stop bit is required for transmission of data
but speed of the data transmission in synchronous is very high data rate
and in asynchronous speed is slow due to the start and stop bit
I believe you are asking about "symmetric vs asymmetric" cryptography. In a symmetric cryptographic cipher both parties must use the same key for encryption and decryption. This means that the encryption key must be shared between the parties before any decryption of the message can take place. This transfer of the shared key opens the door for potential detection of the key. These are commonly referred to as "shared secret systems" or "private key systems". In an asymmetric cipher, the encryption key and the decryption keys are separate. In an asymmetric system, each person has two keys. One key, the public key, is shared publicly. The second key, the private key, should never be shared with anyone. When you send a message using asymmetric cryptography, you encrypt the message using the recipients public key. The recipient then decrypts the message using his private key. That is why the system is called asymmetric. Because asymmetric ciphers tend to be significantly more computationally intensive, they are usually used in combination with symmetric ciphers to implement effect public key cryptography. The asymmetric cipher is used to encrypt a session key and the encrypted session key is then used to encrypt the actual message. This gives the key-exchange benefits of asymmetric ciphers with the speed of symmetric ciphers. Examples of symmetric ciphers are AES and DES. Examples of asymmetric cipers are RSA and Diffie Hellman.
I think you may be confusing synchronous/asynchronous communication with symmetric/asymmetric key encryption. Not being certain which you are inquiring about, I'll try to explain each term: Synchronous communication is used for example, in computer transmission of data, whereby a timing mechanism is used so that each device has a pre-defined period of time to deliver its message. Asynchronous communication occurs with your standard phone for example. Anyone can talk whenever they want and the message is transmitted. Symmetric key encryption describes the use of a single, secret key that is shared between the sender and the recipient. The sender encodes the message using the secret, and the recipient is the only other person who can decode it because he's the only other who knows the secret. Asymmetric key encryption involves the use of mathematically related key pairs - one key is used to encrypt the message, and the other must be used to decrypt it. The concept for asymmetric key exchanges is a bit complicated, if you'd like further info, I suggest doing a search on Public Key Cryptography.
The major differences between synchronous encryption and asynchronous encryption is in terms of security and communication. For asynchronous encryption, there is no need for secure exchange one or maybe more secret keys between the concerned parties during the initial stage. The reverse is true of synchronous encryption. There are similar keys or keys with simple transformation with each other that are known to the concerned parties, more like a private link of information.
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What is a slip in electricity?
it is the difference between the synchronous and asynchronous speed of a induction motor
What is the difference between synchronous and asynchronous interrupts?
i/o data transfer speed of time
What is the difference between synchronous IO and asynchronous IO?
If a process requests that the O/S write data to disk, and has to wait for it to be written before continuing, then that is Synchronous. If the process does not have to wait for the write to be completed, that is Asynchronous. Synchronous is real-time.
Difference between internal and external interrupt?
internal interrupt is synchronous with the program while external interrupts are asynchronous.
Difference between synchronous generator and synchronous motor?
ASYNCHRONOUS is a mode whereby events happens irregardless of control. SYNCHRONOUS are this same events but controlled by a timing and/or control
Difference between synchronous and asynchronous flip flops?
Synchronous flip-flops change outputs synchronously to a clock signal, while asynchronous flip-flops can change outputs regardless of the clock signal. Asynchronous flip-flops are not as commonly used due to potential timing hazards, while synchronous flip-flops are widely used in digital circuits to ensure reliable operation.
What is difference between minimum mode and maximum mode of 8251?
The 8251 is a USART (Universal Synchronous Asynchronous Receiver Transmitter). It does not have a minimum and maximum mode.
Differecne between synchronous circuit and a asynchronous circuit?
Synchronous circuits operate under the influence of s clock pulse while asynchronous circuits operate without the influence of a clock pulse
Difference between synchronous bus and asynchronous bus?
1. Syncrhonous bus includes clock in control lines whereas asynchronous bus is not clocked. 2. the devices which need to be connected by synchronous bus should be at same speed whereas an asynchronous bus may connect many devices with varying speeds. 3. A fixed protocol is defined to communicate using synchronous bus which is relative to the clock. An asynchronous bus uses handshaking protocol.
Difference between synchronous and asynchronous motors?
1)Synchronous motors are those that run only at Synchronous speed i.e. constant speed. But Motor can run in various speeds. 2)Synchronous motors runs at same speed of magnetic filed. but if one consider case of induction motor the rotor rotates at different speed than revolving magnetic field. there is slip between field and rotor.
The main difference between sdram and dram is that dram is?
The main difference between Synchronous random access memory, SDRAM and Dynamic Random Access Memory, DRAM is that SDRAM is synchronous while DRAM is asynchronous. As such, SDRAM is efficient in retrieving and storing data than DRAM.
What the different between synchronous and asynchronous?
In asynchronous transmission , the receiver and the transmitter each use their own clock signals so its not possible to know when a word starts and stops. while in synchronous , the receiver and the transmission have common clock signals.
