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Can you do encryption without a shared secret or a previous exchange of public key OR how to trust the 1st exchange?
Yes, encryption can be performed without a shared secret or a previous exchange of public keys through the use of asymmetric encryption or public key infrastructure (PKI). In this system, each party has a pair of keys: a public key, which can be shared openly, and a private key, which is kept secret. To trust the first exchange, digital certificates issued by a trusted certificate authority (CA) can be used to verify the authenticity of public keys, ensuring that the keys belong to the claimed entities. This mechanism helps establish trust without prior key exchanges.
What else can I help you with?
How can public key encryption be used to distribute a secret key?
Public key encryption can be used to securely distribute a secret key by allowing two parties to exchange a symmetric key without revealing it to potential interceptors. One party generates a secret key and encrypts it using the recipient's public key, ensuring that only the recipient can decrypt it with their corresponding private key. This method ensures that even if the encrypted key is intercepted during transmission, it cannot be accessed without the private key, thus maintaining the confidentiality of the symmetric key used for subsequent communications.
Two kinds of keys are used in public key encryption?
In public key encryption, two kinds of keys are utilized: the public key and the private key. The public key is shared openly and used to encrypt messages, while the private key is kept secret and used to decrypt those messages. This system ensures that only the intended recipient, who possesses the corresponding private key, can access the encrypted information. This method enhances security by enabling secure communication without the need for sharing a secret key beforehand.
Examples of public key cryptography?
Public Key Cryptography is a method of secure communication. It involves the creation of both a public and a private key. When sending a message, the sender encrypts the message with the recipients public key. After receiving the message, the recipient may then decode the message with his/her associated private key. One area that public key cryptography is used in is SSL / TLS (Secure Socket Layer). An example of an SSL library is the CyaSSL Embedded SSL Library. CyaSSL provides several public key cryptography options, including RSA, DSS, DH, and NTRU. In addition to SSL, Public Key Cryptography is used in a large variety of techniques, algorithms, and protocols including: Diffie-Hellman key exchange protocol RSA Encryption Algorithm Cramer-Shoup cryptosystem NTRUEncrypt cryptosystem GPG, OpenPGP Internet Key Exchange PGP
Is asymmetric encryption The key are math?
Yes, asymmetric encryption relies on mathematical principles, specifically involving key pairs: a public key and a private key. The public key encrypts data, while the private key decrypts it, ensuring that only the intended recipient can access the information. The security of this method is based on complex mathematical problems, such as factoring large primes or solving discrete logarithms, which are computationally difficult to reverse. This makes asymmetric encryption a robust method for secure communication.
In asymmetric encryption the keys are mathematically?
In asymmetric encryption, the keys are mathematically related but serve different purposes: one is a public key, which can be shared openly, and the other is a private key, which is kept secret. The encryption process uses the public key to encrypt data, while the decryption process requires the corresponding private key. This relationship ensures that only the holder of the private key can decrypt messages encrypted with the public key, providing a secure means of communication. The mathematical foundation typically involves complex algorithms based on number theory, such as RSA or elliptic curve cryptography.
What are three broad categories of applications of public-key cryptosystems?
Encryption/decryption, Digital signature and Key exchange
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 most popular symmetric encryption system used over the Web?
The most common hybrid system is based on the Diffie-Hellman key exchange, which is a method for exchanging private keys using public key encryption. Diffie-Hellman key exchange uses asymmetric encryption to exchange session keys. These are limited-use symmetric keys for temporary communications; they allow two entities to conduct quick, efficient, secure communications based on symmetric encryption, which is more efficient than asymmetric encryption for sending messages. Diffie_Hellman provides the foundation for subsequent developments in public key encryption. It protects data from exposure to third parties, which is sometimes a problem when keys are exchanged out-of-land.
What kind of encryption uses the concept of public keys?
Asymmetric encryption employs the use of public/private key pairs.
Can companies make public issue without listing in stock exchange?
No. Every public issue of shares has to be followed by listing in an organized stock exchange.
Most encryption software products use a method called?
Public-Key Encryption RSA Technology
To accurately transmit an electronic message the sender needs to know one code and the receiver needs to know a different one. what online security measure is being used?
It is the Public Key Encryption. A user using the Public Key Encryption has to have both a private key and a public key to send a secured message. The private key is used to unlock both a private and a public key encryption. A public key cannot unlock a private encryption.
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.
Is knapsack algorithm is a public key encryption algorithm?
yes
How many keys are required for public key encryption?
two
Which part of the encryption mechanism is transferred and exchanged?
the public key
What is an accurate description of an asymmetric encryption technology?
It is an encryption process that uses a public and private key pair to encrypt/decrypt data.
