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Disable the use of a symmetric encryption cipher algorithm for data encryption on the secure trusted channel (STC) admin channel.The STC admin channel is local to the appliance, and is used to transmit data between the local services and applications running on the appliance (such as LunaSH, NTLS, and the STC service) and the HSM SO partition.
All data transmitted over the STC link will be encrypted using the cipher that is both enabled and that offers the highest level of security. For example, if AES 192 and AES 256 are enabled, and AES 128 is disabled, AES 256 will be used. You can use the command hsm stc cipher show to show which ciphers are currently enabled/disabled and the command "stc status" on page 1 to display the cipher that is currently being used.
Note: Performance is reduced for larger ciphers.
hsm stc cipher disable -all -id <cipher_id>
| Parameter | Shortcut | Description |
|---|---|---|
| -all | -a | Disable all ciphers. |
| -id <cipher_id> | -id <cipher_id> | Specifies the numerical identifier of the cipher you want to disable, as listed using the command "stc configuration cipher show" on page 1. |
lunash:>hsm stc cipher show
This table lists the ciphers supported for STC links to the HSM SO partition. Enabled
ciphers are accepted during STC link negotiation with a client. If all ciphers
are disabled, STC links to the HSM SO partition are not encrypted.
STC Encryption: On
Cipher ID Cipher Name Enabled
_________________________________________________________________
1 AES 128 Bit with Cipher Block Chaining Yes
2 AES 192 Bit with Cipher Block Chaining Yes
3 AES 256 Bit with Cipher Block Chaining Yes
Command Result : 0 (Success)
lunash:>hsm stc cipher disable -id 3
AES 256 Bit with Cipher Block Chaining is now disabled.
Command Result : 0 (Success)
lunash:>hsm stc cipher show
This table lists the ciphers supported for STC links to the HSAM SO partition. Enabled
ciphers are accepted during STC link negotiation with a client. If all ciphers
are disabled, STC links to the HSM SO partition are not encrypted.
STC Encryption: On
Cipher ID Cipher Name Enabled
_________________________________________________________________
1 AES 128 Bit with Cipher Block Chaining Yes
2 AES 192 Bit with Cipher Block Chaining Yes
3 AES 256 Bit with Cipher Block Chaining No
Command Result : 0 (Success)