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    • How to Open a Simplex Lock

      How to Open a Simplex Lock

      Simplex locks, now manufactured by Kaba Ilco, are simple push-button combination locks. Simplex locks are used to protect equipment rooms, labs, and FedEx-type boxes. Simplex locks are used whenever having a large number of keys would create logistical problems. Simplex Lock Combinations The Simplex lock would be a normal 5-button combination lock, except for one

    • What Are Default Passwords?

      The following are default usernames and passwords for many systems: AS/400 qsecofr qsecofr /* master security officer */ qsysopr qsysopr /* system operator */ qpgmr also qpgmr /* default programmer */ ibm password ibm 2222 ibm service qsecofr 1111111 qsecofr 2222222 qserv qserv qsvr qsvr secofr secofr qsrv ibmce1 DECserver ACCESS SYSTEM Dynix (The library

    • Substitution and Transposition Ciphers

      Substitution and Transposition Ciphers

      Substitution and transposition ciphers are two categories of ciphers used in classical cryptography. Substitution and transposition differ in how chunks of the message are handled by the encryption process. Substitution ciphers Substitution ciphers encrypt plaintext by changing the plaintext one piece at a time. The Caesar Cipher was an early substitution cipher. In the Caesar

    • Brute Force Attack

      Brute Force Attack

      A brute force attack consists of trying every possible code, combination, or password until the right one is found. Determining the Difficulty of a Brute Force Attack The difficulty of a brute force attack depends on several factors, such as: How long can the key be? How many possible values can each key component have?

    • How to Set up a VPN

      How to Set up a VPN

      A Virtual Private Network (VPN) is typically used by companies, schools, and other organizations when they want to allow remote access to their servers, printers, and other network devices without compromising security. A VPN therefore extends a private network across the internet, but protects this connection by encrypting it, thereby creating what many refer to

    • Why Everyone Should Use a VPN

      Why Everyone Should Use a VPN

      VPN, or a Virtual Private Network, connects computers and other devices using an encrypted connection. This means that all data travelling through such a network is unreadable to anyone who might intercept the data stream, making it as private as it would be if all of the connected devices resided within the walls of a

    • How to Uninstall CyberDefender

      How to Uninstall CyberDefender

      CyberDefender is an example of malicious software that poses as an anti-virus software. CyberDefender runs a fake computer scan, then lists a number of “threats” that are really non-existent files, random files, or files that are essential to the computer’s performance. When the user attempts to remove these threats, CyberDefender asks the user to purchase

    • Known Ciphertext Attack

      Known Ciphertext Attack

      The known ciphertext attack, or ciphertext only attack (COA) is an attack method used in cryptanalysis when the attacker has access to a given set of ciphertext(s). The attacker does not have access to corresponding cleartext in this method; however, COA is successful when correspdonding plaintext can be determined from a given set of ciphertext.

    • XOR Encryption

      XOR Encryption

      The XOR encryption is a simple symmetric cipher that is used in many applications where security is not a defined requirement. The XOR Operator XOR (Exclusive OR) is a bitwise operator from binary mathematics. The six bitwise operators, as defined in the C programming language, are: Operation Symbol AND & Inclusive OR | Exclusive OR

    • How Do Keygens Work?

      How Do Keygens Work?

      Anyone who plays video games knows that they are not cheap. To get around paying for them, many users take advantage of keygen software that is widely available for free on the Internet market and allows users to trick the game into thinking that they have the correct registration key. This type of theft does

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