Is defuse/php-encryption suitable for use in network encryption? -


i managing 2 servers have shared secret key.

i able send data between servers in manner if listening in middle, data read if has secret key. requirements are:

  • encryption
  • authentication

but also:

  • freshness: old encrypted data has been intercepted in past not accepted if transmitted else.

i wondering if defuse/php-encryption applicable scenario given provides encryption , authentication. took @ libsodium want stay away pecl if possible.

thank you.

i suggest use existing cipher suite can "blanket secure" entire connection between 2 parties. then, in case, use digital certificates (they can self-signed ...) secure connection. (do not use "shared secrets," a.k.a. "passwords.")

  • tls (the successor ssl) used https secure web-sites. (be sure use current version of protocol!)
  • vpn (as "openvpn" or "ipsec") provides "a secure router" between 2 subnets. advantage of strategy 2 parties don't have anything obtain secure, reliable connection:   it’s there.
  • ssh able "tunneling," it's too-easy (imho) data wind being passed insecurely, , doesn't provide identity-verification.

these cipher suites provide 3 important guarantees:

  1. the data not intelligible other party.
  2. there no "man in middle." parties can identify whom communicating.
  3. messages received known "exactly sender sent."
  4. nothing in-secure passing "out of band" between 2 parties.

... , yet, operate "in background," routinely see tls doing when connect secure web-site. "it is secure, , 'it works.'" very important scheme unobtrusive authorized users.


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