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Many people decide to purchase used computers due to a tight budget

Used computers are available plenty in number. But, the prime concern is that how it will satisfy the needs of the purchaser. The next one is about the functionality of the used computer and the longevity of the computer parts of the used computer. Many people decide to purchase used computers due to a tight budget, but they should not end up buying a showpiece rather than a working piece. This makes it very important to evaluate the used computer before buying it. Evaluation can be done by the purchaser himself provided he has some knowledge on computers and their parts. If not, he can get some help from their friends or relatives who are good in evaluating computers. The used computer’s physical parts should be inspected thoroughly. First step is … Read entire article »

Filed under: Hardware

Using hashes greatly increases safety of passwords storage

Many know that hashes are encoded passwords. Using hashes greatly increases safety of passwords storage, for example, in the forums, databases, etc. Let’s assume forum administrator has password “admin12345″ which is certainly stored in the forum database. What is to be done to authenticate user on the forum? Input password shall be compared with “admin12345″. If they match, administrator may enter the forum. It seems working great, but what if someone unauthorized gets access to database and sees open password and can easily log in as administrator. Here hashes come to rescue. For instance, MD5-hash for “admin12345″ password will look like “7488e331b8b64e5794da3fa4eb10ad5d” and it’s exactly what we store in our database, not a password itself. During user authentication input password is converted to hash to compare with the hash stored … Read entire article »

Filed under: Software