Hello! In the 1.6 version, we use md5 + salt.
— PrestaShop (@PrestaShop) March 12, 2019
In the 1.7 version, we use bcrypt. We're no longer sending the password (since 2016 in 1.7, more information below) https://t.co/9mW97IBPgZ
https://goo.gl/EO0ad1
https://goo.gl/xF8heB