Before version 8.0.0, user passwords were stored in plaintext in user_pw database field within tig_users table, but in plaintext. It was possible to enable storage of the MD5 hash of the password instead, however this limited authentication mechanism SASL PLAIN only. However an MD5 hash of a password is not really a secure method as it is possible to revert this mechanism using rainbow tables.

Therefore, we decided to change this and store only encrypted versions of a password in PBKDF2 form which can be easily used for SCRAM-SHA-1 authentication mechanism or SCRAM-SHA-256. SASL PLAIN mechanism can also used these encrypted passwords. The storage of encrypted passwords is now enabled by default in v8.0.0 of Tigase.