Security Books

["Alex Nedelcu" <alexpheno () gmail com>]

Hello list,

I would really appreciate if someone would recommend to me some books
that contain information related to the following:
PKI, digital signatures and Certificate authorities. I'm interested in
a functional approach rather than a highly detailed description of
these technologies. I know that there's a plethora of choices from the
big publishers but i appreciate more an opinion from an information
security professional rather than an editor's review.

Thanks in advance.

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