hi all,
i want to be a specialist in computer and information security, but i need advice and suggestion on things i need to do to be a specialist in this area.
any suggesttion would be appreciated

Can you let me know please that what is the best software for computer security. I want to protect my server.

There are tons and tons of books, forums devoted to answer both of the above questions....
Did you try to do a google search on this subject ?

Searching Internet and visit libraries is very useful for you to become a computer specialist :)

What do you want to specialize in? Saying you want to be a specialist in Information Security (IS) is like saying you want to be a doctor. What kind?

The field is HUGE!!!!
Here are some buzzwords:

Cryptography (symmetric, asymmetric algo's) DES, TDES, RSA, DH, ECC, AES, etc
Application Security
Software Security
Protocol Security
PKI / Key Management
IT Security
ISSE
Information Systems

Just search job boards like Dice with keywords and you can start to narrow in on the scope of different positions.

You can also search various Security-related certifications, like:
CISSP, ISSAP, ISSEP, ISSMP
SANS GIAC, etc
CEH

If you want to be an auditor:
CISA, CISM, ISO 27001, SOX, PCI-DSS, HIPPA, etc

Good Luck!

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