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PHP Programming/Encryption

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Secure HTTP headers PHP Programming
Encryption 		PHP CLI

PHP provides several functions to encrypt data.

Symmetrical encryption

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Storing passwords in clear (unencrypted), in a file or a database, constitutes a security breach. To be able to encrypt and decrypt them, a symmetrical encryption can be done by:

  • openssl_encrypt()[1]
  • openssl_decrypt()

Asymmetrical encryption

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The asymmetrical encryption est used to check an identity, via a public and a private key. In PHP, it's done with:

  • openssl_public_encrypt()[2]
  • openssl_private_decrypt()

Hashing

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crypt()[3] is a hash function for a string, which can add a salt as an optional second parameter.

References

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  1. ↑ http://php.net/manual/en/function.openssl-encrypt.php
  2. ↑ https://www.php.net/manual/en/function.openssl-public-encrypt.php
  3. ↑ http://php.net/manual/en/function.crypt.php


  Secure HTTP headers PHP Programming
Encryption 		PHP CLI  
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