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Configure AES Encryption
By default, AES encryption is not enabled. The mechanism and encryption must be configured properly for the server and client.
To enable AES encryption
1. Add the AES mechanism to the installation mechanism list. In CBF, set this parameter:
Security, System, mechanisms = aes
2. Turn on encryption on the client for either all or individual connections: 
For all connections: Set the outbound encryption mode (for both the installation and Communications Server) to at least OPTIONAL or to PREFERRED or ON. In CBF, set these parameters:
On the client: Security, System, ob_encrypt_mode
On the client: Net Server, ob_encrypt_mode
For individual connections: Use the encryption_mode attribute in the vnode or connection string.
These settings allow the Communications Server to consider the use of all enabled mechanisms that support encryption, including AES and INGRES.
Additional settings can ensure that only the AES mechanism be used.
To ensure that ONLY the AES mechanism is used
1. (Optional) Add AES mechanism to Net Server mechanism list; otherwise leave as DEFAULT. In CBF, set this parameter:
Net Server, mechanisms = aes
2. (Recommended) Set inbound and outbound encryption mechanisms as AES; otherwise leave as *. In CBF, set these parameters:
On the client: Security, System, ob_encrypt_mech = aes
On the client: Net Server, ob_encrypt_mech = aes
On the server: Net Server, ib_encrypt_mech = *
3. Set inbound and outbound encryption mode. Default values are recommended. In CBF, set these parameters:
On the client: Security, System, ob_encrypt_mode = off
On the client: Net Server, ob_encrypt_mode = off
On the server: Net Server, ib_encrypt_mode = optional
Note:  If the outbound encryption mode is set to ON, then the encryption_mode connection attribute can be used to turn off encryption if not needed.
To override outbound encryption mode configuration for an individual connection
Connection string:
VNODE attribute:
encryption_mode = on
To override outbound encryption mechanism configuration for an individual connection
Overriding inbound and outbound encryption mechanism configuration is optional and typically not needed.
Connection string:
VNODE attribute:
encryption_mechanism = aes
INGRES Mechanism Configuration for Encryption
The INGRES security mechanism also supports encryption but is not cryptographically secure. The INGRES mechanism is always available and may end up providing encryption if the AES mechanism is not properly configured in either the client or server installations.
To ensure the INGRES mechanism will not provide encryption
Set the following parameter in CBF:
Security, System, Mechanisms, ingres, encryption_enabled = false
This setting indicates if the INGRES mechanism encryption capability is enabled (true) or disabled (false). The default is false.
AES Security Mechanism Configuration
Advanced settings for AES Encryption include the following in CBF. Typically, no changes are required. For more information on these parameters, see online help.
Security, System, Mechanisms, aes, enabled = true
Security, System, Mechanisms, aes, module = gcsaes
Security, System, Mechanisms, aes, entry = gcs_aes
Security, System, Mechanisms, aes, aes_key_size = 128
Security, System, Mechanisms, aes, rsa_key_size = 1024
Security, System, Mechanisms, aes, rsa_key_scope = process
Performance Impact of RSA Key Settings
RSA key generation for an AES encrypted connection can significantly impact the time required to make a new connection. Consider these settings:
Using the rsa_key_scope=process option can reduce the amount of time for establishing subsequent connections when a process makes more than one connection. 
Increasing rsa_key_size may increase the security level but will likely cause longer connect times because larger RSA keys take longer to generate.
Note:  RSA key settings do not affect performance after the connection is made.
JDBC Encryption
For information on enabling AES encryption in JDBC connections, see the Connectivity Guide.
Last modified date: 01/30/2023