Pleasanter.net's security measures are as follows: ・Communication encryption using TLS ・User authentication using account/password ・Password hash encryption (SHA512) ・Data encryption using SQL Database Transparent Data Encryption ・Prevention of unauthorized requests using SQL Database Advanced Data Security ・Prevention of unauthorized requests using Application Gateway (WAF) ・Logging of all requests (retention period of 3 years) ・Connection restrictions by IP address (optional service for the standard plan) ・Physical security using domestic Microsoft Azure data centers