November 2001
Intermediate to advanced
496 pages
13h 51m
English
Content preview from Java Programming with Oracle JDBCBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Data Integrity
Data integrity ensures that a data packet from one end of a connection reaches the other end unchanged. This prevents two additional types of malicious attacks: data tampering and replay. Data tampering occurs when part of a data packet’s contents are modified in transit. Replay is the process of transmitting a valid transaction multiple times.
Data integrity is ensured using MD5 cryptographic checksums.[2] When you use Oracle Advanced Security’s data integrity facilities, a cryptographically secure message digest is created for, and passed with, each data packet sent across the network. This message digest is a checksum value that changes if any of the data in a data packet changes.
Enabling Data Integrity on a Server
To enable data integrity on a server, you need to set the SQLNET.CRYPTO_CHECKSUM_SERVER and SQLNET.CRYPTO_CHECKSUM_TYPES_SERVER parameters in your server’s sqlnet.ora file. The syntax for setting these parameters is:
SQLNET.CRYPTO_CHECKSUM_SERVER=[REJECTED | ACCEPTED | REQUESTED | REQUIRED] SQLNET.CRYPTO_CHECKSUM_TYPES_SERVER=(MD5)
which breaks down as:
-
SQLNET.CRYPTO_CHECKSUM_SERVER Specifies the server’s preference for whether data integrity is used when new connections are made. The following are valid values:
- REJECTED
The server does not support data integrity. Connections from clients requesting data integrity will be refused.
- ACCEPTED
The server will accept a request from the client to support data integrity.
- REQUESTED
The server will request data ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.