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Is knapsack algorithm is a public key encryption algorithm?
yes
Why should the encryption algorithm be made public?
To help people find the weakness of the algorithm
What is symmetric cipher?
A symmetric cipher is an algorithm that uses the same secret (private key) for both encryption and decryption. An asymmetric cipher is an algorithm that uses two different secrets, a public key for encryption, and a private key for decryption. In English, basically the job of cryptography algorithms are to make text or files jumbled so it can't be read except by the desired recipients. Different algorithms use different techniques for doing this such as switching the order of letters or substituting them with a different letter, and the secret provides the exact instructions on how to do that.
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.
How many encryption keys are needed to fully implement an asymmetric algorithm for 55 participants?
In an asymmetric encryption algorithm, each participant requires a pair of keys: a public key and a private key. Therefore, for 55 participants, you would need 55 public keys and 55 private keys, resulting in a total of 110 keys. However, since each participant has their own pair, the total number of unique key pairs remains 55.
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.
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.
What kind of encryption uses the concept of public keys?
Asymmetric encryption employs the use of public/private key pairs.
Vulnerabilities of a public key encryption using RSA algorithm?
The RSA algorithm can be vulnerable to several attacks if not implemented correctly. One common vulnerability is the use of weak key sizes; using smaller keys can make the encryption susceptible to factoring attacks. Additionally, poor random number generation for key creation can lead to predictable keys, while side-channel attacks can exploit information leaked during encryption or decryption processes. Lastly, improper padding schemes can lead to attacks such as the Bleichenbacher attack, which targets the way plaintext is padded before encryption.
What is the best public-key cryptography algorithm and why?
RSA (Rivest, Shamir, and Adelman) is the best public key algorithm.
