PHP Programming/Encryption

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Secure HTTP headers PHP Programming
Encryption 		PHP CLI

PHP provides several functions to encrypt data.

Symmetrical encryption[edit | edit source]

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[edit | edit source]

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[edit | edit source]

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

References[edit | edit source]

  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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