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SecurityYou can secure your Informix® database server and the data that is stored in your Informix® databases. You can encrypt data, secure connections, control user privileges and access, and audit data security.
Security in HCL Informix®The Informix® Security Guide documents methods for keeping your data secure by preventing unauthorized viewing and altering of data or database objects, including how to use the secure-auditing facility of the database server.
Securing data
Network data encryptionUse network encryption to encrypt data transmitted between server and client, and between server and other server.
Communication support modules for data transmission encryptionYou can use the communication support modules (CSMs) to encrypt data transmissions, including distributed queries, over the network.
MAC levelsMAC levels determine the type of MAC key generation.

MAC levels

MAC levels determine the type of MAC key generation.

The supported generation levels are:

high. Uses SHA1 MAC generation on all messages.
medium. Uses SHA1 MAC generation for all messages greater than 20 bytes long and XOR folding on smaller messages.
low. Uses XOR folding on all messages.
off. Does not use MAC generation.

The level is prioritized to the highest value. The off entry must only be used between servers when it is guaranteed that there is a secure network connection.

All servers and client computers that transmit encrypted communication must have at least one MAC level setting in common. For example, if one database server has a level of high and medium enabled and the other database server has only low enabled, then the connection attempt fails. But if a database server has high and medium settings and the other database server has only the medium setting, the MAC generation levels support a connection.

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