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What are the difference between DES and RSA algorithm?
DES is a symmetric cryptographic algorithm, while RSA is an asymmetric (or public key) cryptographic algorithm. Encryption and decryption is done with a single key in DES, while you use separate keys (public and private keys) in RSA. DES uses 56-bit keys for encryption while RSA uses 2600-bits of KEY
Advantages of RSA algorithm in encryption and decryption of a plain text?
RSA's biggest advantage is that it uses Public Key encryption. This means that your text will be encrypted with someone's Public Key (which everyone knows about). However, only the person it is intended for can read it, by using their private key (which only they know about). Attempting to use the Public Key to decrypt the message would not work. RSA can also be used to "sign" a message, meaning that the recipient can verify that it was sent by the person they think it was sent by.
What does PKI stand for?
It stands for Public Key Infrastructure. It has to do with security and data encryption.
Which encryption algorithm is better and why?
If you're talking about symmetric key encryption (the kind where you just use one key for encryption and decryption), then arguably, the best encryption algorithm you can use is the Rijndael algorithm, better known now as AES (advanced encryption standard). It is the encryption standard used by the U.S. government for classified information. It is fast, requires little memory, and the only potential attacks against it are highly theoretical. Rijndael beat out Twofish and Serpent in the AES standard contest, but those other two algorithms will provide more than enough security as well. In the end, it doesn't really matter, since most successful attacks are made simply by finding out your key through brute force, espionage or extortion, rather than pure data analysis. Humans are almost always the weakest point when it comes to security, and it doesn't matter what algorithm you use if someone can guess your password.
What are the disadvantage of rsa algorithm?
A disadvantage of using public-key cryptography for encryption is speed. There are many secret-key encryption methods that are significantly faster than any currently available public-key encryption method. Nevertheless, public-key cryptography can be used with secret-key cryptography to get the best of both worlds. For encryption, the best solution is to combine public- and secret-key systems in order to get both the security advantages of public-key systems and the speed advantages of secret-key systems. Such a protocol is called a digital envelope, which is explained in more detail in Question 2.2.4.Public-key cryptography may be vulnerable to impersonation, even if users' private keys are not available. A successful attack on a certification authority (see Question 4.1.3.14) will allow an adversary to impersonate whomever he or she chooses by using a public-key certificate from the compromised authority to bind a key of the adversary's choice to the name of another user.In some situations, public-key cryptography is not necessary and secret-key cryptography alone is sufficient. These include environments where secure secret key distribution can take place, for example, by users meeting in private. It also includes environments where a single authority knows and manages all the keys, for example, a closed banking system. Since the authority knows everyone's keys already, there is not much advantage for some to be "public" and others to be "private." Note, however, that such a system may become impractical if the number of users becomes large; there are not necessarily any such limitations in a public-key system.Public-key cryptography is usually not necessary in a single-user environment. For example, if you want to keep your personal files encrypted, you can do so with any secret key encryption algorithm using, say, your personal password as the secret key. In general, public-key cryptography is best suited for an open multi-user environment.Public-key cryptography is not meant to replace secret-key cryptography, but rather to supplement it, to make it more secure. The first use of public-key techniques was for secure key establishment in a secret-key system [DH76]; this is still one of its primary functions. Secret-key cryptography remains extremely important and is the subject of much ongoing study and research. Some secret-key cryptosystems are discussed in the sections on block ciphers and stream ciphers.
Which encryption algorithm is commonly used as a public key cipher?
Type your answer here... RSA
What are the difference between DES and RSA algorithm?
DES is a symmetric cryptographic algorithm, while RSA is an asymmetric (or public key) cryptographic algorithm. Encryption and decryption is done with a single key in DES, while you use separate keys (public and private keys) in RSA. DES uses 56-bit keys for encryption while RSA uses 2600-bits of KEY
The combination of a public key and a private key is known as a?
This is known as RSA encryption. Encryption involving a public and private key combination is known as asynchronous cryptography, as opposed to synchronous cryptography. It is also known as public key cryptography. RSA is an algorithm that may be used (but there are others that can be used), in public key cryptography. (A key pair)
Public key encryption is also known as asymmetric encryption?
Yes. Public Key encryption (or asymmetric encryption) requires a pair of keys; a public and a private key for exchanging data in a secure manner.
What is the definition of an encryption key?
The definition of an encryption key is a way to transform information using an algorithm. By doing this, not anyone can read the transformed scripts, but only those who know the algorithm can solve the scripts.
What encryption algorithm should I use if performance is a key factor?
AES
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 best public-key cryptography algorithm and why?
RSA (Rivest, Shamir, and Adelman) is the best public key algorithm.
Private key encryption safer than public key?
No, Public key cryptography is safer than Private key Cryptography. In public key cryptography only only one part of key is visible to others.
What is the difference between AES and RSA?
AES is a symmetric cryptographic algorithm, while RSA is an asymmetric (or public key) cryptographic algorithm. Encryption and decryption is done with a single key in AES, while you use separate keys (public and private keys) in RSA. The strength of a 128-bit AES key is roughly equivalent to 2600-bits RSA key.
Utilizing Public Key Encryption How would John and Jim send an encrypted message between parties?
John would use Jim's public key to encrypt and Jim would use his private key to decrypt.Public Key Cryptography (Asymmetric encryption)An algorithm where data encrypted with a public key can only be decrypted by the matching private key. Vice versa is true, what is encrypted with a private key can only be decrypted with a public key.
How you can decrypt the file?
Only with the proper Encryption key, without that it's lost forever. Encryption uses a different algorithm every time, and only the key generated at the time of encryption can decrypt that file.
