Welcome
Security
You 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 HCL® 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 encryption
Use network encryption to encrypt data transmitted between server and client, and between server and other server.
Communication support modules for data transmission encryption
You can use the communication support modules (CSMs) to encrypt data transmissions, including distributed queries, over the network.
Network data encryption syntax
You must specify network encryption libraries and options in the concsm.cfg file.
Invoking an encryption parameters file in concsm.cfg
You can configure encryption options by setting encryption parameters in a file and then invoking it in the concsm.cfg file.
ENCCSM_CIPHERS parameter
The ENCCSM_CIPHERS parameter specifies the ciphers and modes to use during encryption.

HCL Informix® V15.0.0 documentation
Welcome to the documentation for HCL Informix® 15.0.0 and related client tools and products.
Product overview
HCL Informix® is a fast and scalable database server that manages traditional relational, object-relational, and dimensional databases. Its small footprint and self-managing capabilities are suited to embedded data-management solutions.
Installing
These topics describe how to install HCL Informix® database servers, client products, and modules.
Administering
In addition to administering the database server, you can tune performance, replicate data, and archive data.
Migrating and upgrading
You can upgrade to the 15.0.0 release of HCL Informix® or migrate from other database servers to Informix. Upgrading is an in-place migration method that uses your existing hardware and operating system software. Some changes to the Informix database server can affect upgrading from a previous release.
Client APIs and tools
You can use the HCL Informix® implementation of client APIs to develop applications for Informix database servers.
Embedding Informix®
When you embed HCL Informix®, you can use enterprise-class high-availability and high performance with embeddability features such as easy programmability, a small disk and memory footprint, and silent deployment.
Extending Informix®
Beyond standard relational database objects, HCL Informix® can be extended to handle specialized data types, access methods, routines, and other objects. Informix includes many built-in extensions that are fully integrated in the database server. Informix also provides modules, which are packages of extended database objects for a particular purpose and that are installed separately from the database server. Alternatively, you can create your own user-defined objects for Informix.
Data warehousing
In addition to designing and implementing Informix® dimensional databases, you can use tools to create data warehouse applications and optimize your data warehouse queries.
Designing databases
The first step in creating a relational database is to construct a data model, which is a precise, complete definition of the data you want to store. After you prepare your data model, you must implement it as a database and tables. To implement your data model, you first select a data type for each column and then you create a database and tables and populate the tables with data. You can also implement fragmentation strategies and control access to your data.
JSON compatibility
You can use the popular JSON-oriented query language created by MongoDB to interact with data stored in HCL Informix®.
Security
You 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 HCL® 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
    - HCL Informix® directory security
      utilities and product directories are secure by default.
    - Network data encryption
      Use network encryption to encrypt data transmitted between server and client, and between server and other server.
      - Communication support modules for data transmission encryption
        You can use the communication support modules (CSMs) to encrypt data transmissions, including distributed queries, over the network.
        Enabling encryption with communication support modules
        You must modify the concsm.cfg file to use encryption with communication support modules.
        CSM configuration file
        To use a communication support module (CSM), you must have a concsm.cfg file.
        Encryption ciphers and modes
        You must specify which ciphers and mode to use during encryption.
        MAC key files
        The MAC key files contain encryption keys that are used to encrypt messages.
        Generating a new MAC key file
        You can generate a new MAC key file to improve the reliability of message verification using encryption.
        MAC levels
        MAC levels determine the type of MAC key generation.
        Switch frequency
        The switch frequency defines when ciphers and or secret keys are renegotiated.
        Network data encryption syntax
        You must specify network encryption libraries and options in the concsm.cfg file.
        Specifying network encryption options in concsm.cfg
        You can modify encryption communication support module (CSM) options by specifying libraries and encryption tags.
        Invoking an encryption parameters file in concsm.cfg
        You can configure encryption options by setting encryption parameters in a file and then invoking it in the concsm.cfg file.
        ENCCSM_CIPHERS parameter
        The ENCCSM_CIPHERS parameter specifies the ciphers and modes to use during encryption.
        ENCCSM_MAC parameter
        The ENCCSM_MAC parameter specifies the MAC level to use.
        ENCCSM_MACFILES parameter
        The ENCCSM_MACFILES parameter specifies the MAC key files to use.
        ENCCSM_SWITCH parameter
        The ENCCSM_SWITCH parameter defines the number of minutes between cipher and key renegotiation.
        Example of encryption parameter file
        The encryption parameter file specifies values for encryption parameters.
      - Enterprise replication and high availability network data encryption
        You can configure network data encryption for Enterprise Replication and high availability clusters by using configuration parameters.
      - Background Knowledge on Keystores
        This topic offers some generic insights into keystores and how they are used for secure communications with the TLS (Transport Layer Security) protocol. While the first part provides the theoretical background, the second part shows examples for applying this in practice using OpenSSL.
    - Column-level encryption
      You can use column-level encryption to store sensitive data in an encrypted format. After encrypting sensitive data, such as credit card numbers, only users who can provide a secret password can decrypt the data.
    - Connection security
      You can administer the security of the connections to the database server by using authentication and authorization processes.
    - Discretionary access control
      Discretionary access control verifies whether the user who is attempting to perform an operation has been granted the required privileges to perform that operation.
    - Label-Based Access Control
      You can use label-based access control (LBAC), an implementation of multi-level security (MLS), to control who has read access and who has write access to individual rows and columns of data.
  - Auditing data security
SQL programming
You can use the HCL Informix® implementation of the SQL language to develop applications for Informix database servers.
Troubleshooting HCL Informix®
Several troubleshooting techniques, tools, and resources are available for resolving problems that you encounter in your HCL Informix® database server environment.

ENCCSM_CIPHERS parameter

The ENCCSM_CIPHERS parameter specifies the ciphers and modes to use during encryption.

syntax ENCCSM_CIPHERS

all|allbut:<list of ciphers and 
modes>|cipher:mode{,cipher:mode ...}

all: Specifies to include all available ciphers and modes, except ECB mode. For example:
```
ENCCSM_CIPHERS all
```
allbut:<list of ciphers and modes>: Specifies to include all ciphers and modes except the ones in the list. Separate ciphers or modes with a comma. For example:
```
ENCCSM_CIPHERS allbut:<cbc,bf>
```
cipher:mode: Specifies the ciphers and modes. Separate cipher-mode pairs with a comma. For example:
```
ENCCSM_CIPHERS des3:cbc,des3:ofb
```
default value: allbut:<ecb>

For more information about ciphers and modes, see Encryption ciphers and modes.