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Printable Version: RFC2828.PDF
RFC 2828 Internet Security Glossary May 2000
$ block cipher
(I) An encryption algorithm that breaks plaintext into fixed-size
segments and uses the same key to transform each plaintext segment
into a fixed-size segment of ciphertext. (See: mode, stream
cipher.)
(C) For example, Blowfish, DEA, IDEA, RC2, and SKIPJACK. However,
a block cipher can be adapted to have a different external
interface, such as that of a stream cipher, by using a mode of
operation to "package" the basic algorithm.
$ Blowfish
(N) A symmetric block cipher with variable-length key (32 to 448
bits) designed in 1993 by Bruce Schneier as an unpatented,
license-free, royalty-free replacement for DES or IDEA. [Schn]
$ brand
(I) A distinctive mark or name that identifies a product or
business entity.
(O) SET usage: The name of a payment card. Financial institutions
and other companies have founded payment card brands, protect and
advertise the brands, establish and enforce rules for use and
acceptance of their payment cards, and provide networks to
interconnect the financial institutions. These brands combine the
roles of issuer and acquirer in interactions with cardholders and
merchants. [SET1]
$ brand certification authority (BCA)
(O) SET usage: A CA owned by a payment card brand, such as
MasterCard, Visa, or American Express. [SET2] (See: certification
hierarchy, SET.)
$ brand CRL identifier (BCI)
(O) SET usage: A digitally signed list, issued by a BCA, of the
names of CAs for which CRLs need to be processed when verifying
signatures in SET messages. [SET2]
$ break
(I) Cryptographic usage: To successfully perform cryptanalysis and
thus succeed in decrypting data or performing some other
cryptographic function, without initially having knowledge of the
key that the function requires. (This term applies to encrypted
data or, more generally, to a cryptographic algorithm or
cryptographic system.)
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