Пакет php7-mcrypt: Информация

The php7-mcrypt includes a dynamic shared object (DSO) that adds
Mcrypt support to PHP. The libmcrypt is a data encryption library.  The
library is thread safe and provides encryption and decryption functions.
This version of the library supports many encryption algorithms and
encryption modes. Some algorithms which are supported: SERPENT,
RIJNDAEL, 3DES, GOST, SAFER+, CAST-256, RC2, XTEA, 3WAY, TWOFISH,
BLOWFISH, ARCFOUR, WAKE and more. Install this package in addition
to main PHP package if you plan to use any of these algorithms.