Product Documentation

Database Administrator's Guide

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c-tree's advanced encryption uses a master encryption key to encrypt the following items using the AES cipher:

  1. The security resource in c-tree data and index files that use advanced encryption, and
  2. The encryption key in the transaction log file header when using advanced log encryption.

The length of the master key was increased from 128 bits to 256 bits. FairCom DB can still access files that were created with the previous 128-bit master key. This keyword reverts to the original 128-bit master key usage.

Attempting to read a transaction log encrypted with a 256-bit encryption key when only 128-bit log encryption support is enabled fails and c-tree logs the following message to CTSTATUS.FCS:

Cannot read existing encrypted logs. Log is using 256-bit encryption key but server is configured for 128-bit encryption support.

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