Question 1)
RSA Data Security Inc. has published a list of 15 public-key cryptography standards (PKCS). RSA was the company that invented the first commercially viable public-key algorithms and they were in the best position to offer advice to users on implementation practices. Since the time of the PKCS introduction, these rules have been incorporated into a number of international standards. Be sure to tell us where we can find an official copy of the PKCS standards.

Question 2)
In 2005 the NSA, as part of its Cryptographic Modernization Program, began to promulgate the use of a set of cryptographic algorithms known as "Suite B." Be sure to include a URL where we can find a list of the algorithms that are included in Suite B.

Question 3)
There is a block cipher mode that is not discussed in our textbook. It is called "Galois Counter Mode (GCM)." Be sure to identify the NIST publication that describes GCM.

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Question 1)
there are currently 13 active PKCS standards, because PKCS#2 and PKCS#4 were incorporated into PKCS#1.

PKCS#1 describes the RSA standard encryption and also defines the necessary mechanisms for wrapping (by encrypting) and signing data by using the public key RSA method.
PKCS#2- merged into PKCS#1, it was invented to cover RSA encryption of message digests;
PKCS#3 represents the regular Diffie-Helman key-agreement protocol;
PKCS#4- also merged into PKCS#1, it covered RSA key syntax;
PKCS#5- also known as PBE- from password-based encryption- contains the methods for generating a secret encryption key based on password;
PKCS#6 – this standard represents the extended-certificate syntax and was gradually eliminated because of X509 version 3;
PKCS#7 – this is the standard of cryptographic message syntax that contains a generic commonly accepted syntax for messages to which cryptography can be applied;
PKCS#8 – represents the description of private-key information syntax and provides method to keep/store the information related to private key;
PKCS#9- attribute types to be used in other PKCS standards;
PKCS#10- represents the revealing of certification request syntax and contains a description of this syntax;...

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