May 1998
Intermediate to advanced
362 pages
10h 8m
English
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Chapter 4. Random Numbers
Random numbers are important for cryptography. As we discussed in Chapter 2, computers are not very good at producing truly random data. Instead, they rely on a pseudo-random number generator (PRNG). A cryptographically strong PRNG, seeded with truly random values, is a PRNG that does a good job of spewing out unpredictable data. But if the PRNG is not cryptographically strong, or if the seed data is not random, the security of your application can be compromised.
In this chapter, I’ll talk about a
cryptographically strong PRNG that was introduced in JDK 1.1,
java.security.SecureRandom. The rest of the
chapter discusses how to produce random seed data from keyboard
events.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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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.