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PLSQL... Script: Cursore, open, fetch
Shell scripting... Script: Looping samples

Basically, a web session can be defined as the timeframe in which a visitor navigates your web site.



XPath is a language for addressing parts of an XML document. It is designed to be used by XSLT and XPointer.

Basically, a web session can be defined as the timeframe in which a visitor navigates your web site.

Documents

Home >Security > How does encryption work?

Stampa  Stampa


Encryption works by encoding the text of a message with a key. In traditional encryption systems, the same key was used for both encoding and decoding. In the new public key or asymmetric encryption systems, keys come in pairs: one key is used for encoding and another for decoding. In this system everyone owns a unique pair of keys. One of the keys, called the public key, is widely distributed and used for encoding messages. The other key, called the private key, is a closely held secret used to decrypt incoming message. Under this system, a person who needs to send a message to a second person can encrypt the message with that person's public key. The message can only be decrypted by the owner of the secret private key, making it safe from interception. This system can also be used to create unforgeable digital signatures.
Most practical implementations of secure Internet encryption actually combine the traditional symmetric and the new asymmetric schemes. Public key encryption is used to negotiate a secret symmetric key that is then used to encrypt the actual data.

Since commercial ventures have a critical need for secure transmission on the Web, there is very active interest in developing schemes for encrypting the data that passes between browser and server.

More information on public key cryptography can be found in the book "Applied Cryptography", by Bruce Schneier.




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signal Marco Magnani marcomagnani@fishscript.com



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A good scientist is a person with original ideas.
A good engineer is a person who makes a design that works with as few original ideas as possible. There are no prima donnas in engineering.
Freeman Dyson


A good scientist is a person with original ideas.
A good engineer is a person who makes a design that works with as few original ideas as possible. There are no prima donnas in engineering.
Freeman Dyson


Security... Citazioni: Sicurezza

Security... Definizioni: A secure hash

Oracle... Definizioni: Transazione


Shell scripting... Script: Hide user input on screen



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Nicoleta e Marco Magnani tutorial, examples, courses, esempi, corsi, esercizi, appunti vari Dottoressa Nicoleta Dragu Formatrice Docente Insegnante Mediatrice Culturale Dott. Marco Magnani Universita La Sapienza Roma Master Computer Science Hunter College New York , Data Base Administrator DBA oracle System architect

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