7.9 Public key infrastructure (X.509) standards 195
PKCS #12: Personal Information Exchange Syntax Standard
Specifies
a portable format for storing and/or transporting a user's private keys
and certificates.
PKCS #13: Elliptic Curve Cryptography Standard
This standard is
still under development.
PKCS #14: Pseudorandom Number Generation Standard
This stan-
dard is still under development.
PKCS #15: Cryptographic Token Information Format Standard
This
standard is targeted at establishing a standard that ensures that users
will be able to use cryptographic tokens to identify themselves to
multiple standards-aware applications.
Abstract Syntax Notation number one, or ASN.1, is a standard that
defines a formal notation for the specification of abstract data types. ASN. 1
is a formal notation used for describing data transmitted by telecommuni-
cations protocols. Also, ASN, 1 covers the structural aspects of information.
A main reason for the success of ASN. 1 is that this notation is linked with
several standardized encoding rules' such as the BER (Basic Encoding
Rules) and the PER (Packed Encoding Rules). ASN.1 has been used in
PKCS documents, including PKCS #5 v2.0, PKCS #12 vl.0, and PKCS
#15 vl.0.
7.9
m
m
Public key infrastructure (X.509) standards
One topic not covered is where X.509 comes from and what organizations
support it. The "International Telecommunication Union" (ITU) is an
organization formerly known as "Consultative Committee on International
Telephone and Telegraphy" (CCITT). The ITU provides telecommunica-
tions standards as well as the "X." standards, such as X.500 (directory ser-
vices) and X.509 (secure directory services). 8
The "Internet Engineering Task Force" (IETF) is an open international
community of network designers, vendors, and researchers focused on the
evolution of the Internet architecture and the operation of the Internet. 9
The IETF has recognized the
X.509
standards to be used in the Internet
technologies. To understand the IETE you need to look at a document that
they created:
http://wvvw.itu.int/
http://vvvvw.ietf.o rg
I Chapter 7

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