DB tablo: login_info

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| login      |  passwd    |  company |
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|company1    |  passmd5   | company1 |
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|company2    |  passmd5   | company2 |
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|company3    |  passmd5   | company3 |
--------------------------------------

giriş maçlar kez, giriş ve firma adı bir oturum değişkeni kaydedilir.

$_SESSION['SESS_MEMBER_ID'] = $log['login']; //where $log is the mysql_fetch_assoc result array
$_SESSION['log_company_id'] = $log['company'];

Then using the stored company name in the session variable, the company details are loaded from a company specific db. I am not relying on cookies for storing this information. Is this method safe? Should I do something else? Any other security measures that I should know of?