cryptographic hash function
Glossary-3
blocking factor
The number of 512-byte blocks to include in each block of data written to each tape
drive. By default, Oracle Secure Backup writes 64K blocks to tape, which is a blocking
factor of 128. Because higher blocking factors usually result in better performance, you
can try a blocking factor larger than the obtar default. If you pick a value larger than is
supported by the operating system of the server, then Oracle Secure Backup fails with
an error.
CA
See Certification Authority (CA)
catalog
A repository that records backups in an Oracle Secure Backup administrative domain.
You can use the Oracle Secure Backup Web tool or obtool to browse the catalog and
determine what files you have backed up. The catalog is stored on the administrative
server.
certificate
A digitally signed statement from a Certification Authority (CA) stating that the
public key (and possibly other information) of another entity has a value. The X.509
standard specifies the format of a certificate and the type of information contained in
it: certificate version, serial number, algorithm ID, issuer, validity, subject, subject
public key information, and extensions such as key usage (signing, encrypting, and so
on). A variety of methods are used to encode, identify, and store the certificate.
Certification Authority (CA)
An authority in a network that performs the function of binding a public key pair to
an identity. The CA certifies the binding by digitally signing a certificate that contains
a representation of the identity and a corresponding public key. The administrative
server is the CA for an Oracle Secure Backup administrative domain.
Certificate Revocation List (CRL)
A list used in a public key infrastructure that enumerates the revoked certificates
maintained by the Certification Authority (CA).
class
A named set of rights for Oracle Secure Backup users. A class can have multiple
users, but each user can belong to one and only one class.
client
Any computer or server whose files Oracle Secure Backup backs up or restores.
content-managed expiration policy
A volume with this type of expiration policy expires when every backup piece on the
volume is marked as deleted. You can make Recovery Manager (RMAN) backups, but
not file-system backups, to content-managed volumes. You can use RMAN to delete a
backup piece.
cryptographic hash function
A one-way function that accepts a message as input and produces an encrypted string
called a "hash" or "message digest" as output. Given the hash, it is computationally
infeasible to retrieve the input. MD5 and SHA-1 are commonly used cryptographic
hash functions.
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