The best answer is that it does both. TLS uses asymmetric encryption to first establish the identity of one or both parties. Secondly, it uses asymmetric encryption to exchange a key to a symmetric cipher. So asymmetric is only used during the initial setup of communication. Symmetric encryption which is used through the rest is faster and more efficient with large amounts of data transfer ...
16 I understand that through SSL, the browser gets the public key of the secured website and through public key encryption rsa algorithm, these 2 establish session key and then continue communication thru some symmetric algorithm, because symmetric key encryption/decryption is faster. Which symmetric key algorithm does SSL use? DES?
32 Yes, purely asymmetric encryption is much slower than symmetric cyphers (like DES or AES), which is why real applications use hybrid cryptography: the expensive public-key operations are performed only to encrypt (and exchange) an encryption key for the symmetric algorithm that is going to be used for encrypting the real message.
A shared secret key can be used to calculate a Message Authentication Code (MAC), which then can be used to confirm the integrity and authenticity of the message to another party which knows the same shared secret. Unlike digital signatures, which are created using the private key and verified using the public key, MACs do not offer non-repudiation (anyone who can verify the MAC can also ...
Store the symmetric key in the registry or a file or the database, split the key and store parts in multiple places for added protection do not decrypt the data unless it is really needed, i.e. not upon read from the database.
Asymmetric encryption helps solve the key distribution problem, but only barely: instead of requiring O (N^2) key pairs between every pair of people wanting to use cryptography to talk amongst themselves, it requires O (N) keys, one public/private pair per person, and everyone just needs to know everyone else's public portion.
Suppose N people want to communicate with each of N- 1 other people using symmetric key encryption. All communication between any two people, i and j, is visible to all other people in this group o...
Public-key cryptography involves two related keys for each recipient involved - a private key which is a secret known only by the recipient, and a related public key which is known by all senders. The sender encrypts the message using the recipient's public key.
I am after a symmetric encryption/decryption routine in C#. I know there have been a few questions on this topic before, but most of the answers seem to be about the philosophy of encryption rather...
I would like to ask about best practices regarding a usage of an initialization vector (IV) and a key for symmetric cryptography algorithms. I want to accept messages from a client, encrypt them and store in a backend.
