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    • The History of Computer Viruses

      The History of Computer Viruses

      Computer viruses have been around just about as long as the personal computer has existed. With the advent of the Internet, the ability of viruses to rapidly spread has increased substantially. Despite this increase in capability to infect large numbers of computers across international borders, the definition of a computer virus has not substantially changed

    • Bootable Antivirus

      Bootable Antivirus

      Bootable antivirus software refers to any type of antivirus program that can be booted from a CD, DVD, or removable hard drive and can detect viruses on a user’s computer without having to startup Windows. Bootable antivirus software can be very important when a virus takes over a computer or prevents regular antivirus software from

    • MD5 (Message Digest 5)

      MD5 (Message Digest 5)

      MD5 is a message digest algorithm. MD5 takes a variable length input and produces a 128-bit message digest. MD5 was designed by Ron Rivest in 1991. MD5 is officially defined in RFC 1321 – The MD5 Message-Digest Algorithm. MD5 Usage MD5 is used in many applications, including GPG, Kerberos, TLS / SSL, Cisco type 5

    • Forensic Science

      Forensic Science

      The word forensic comes from the Latin word forensis, which means “before the forum,” and refers to something “of, pertaining to, or used in a court of law.” In this day and age, it almost always refers to a method of obtaining criminal evidence in order to use it in a court of law. Forensic

    • 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

    • Known Plaintext Attack

      Known Plaintext Attack

      In cryptography, the known plaintext attack, or KPA, is an attack based on having samples of both the plaintext and corresponding encrypted or ciphertext for that information available. This information is used to conduct an analysis of the data in order to determine the secret key used to encrypt and decrypt the information. Historical ciphers

    • How to Change an AOL Password

      How to Change an AOL Password

      There are two circumstances that can cause someone to want to change his/her AOL password: 1) forgetting the AOL password and needing to recover it and 2)  to change the AOL password. The latter can be because the AOL password has leaked to someone or the user wants to adhere to the good practice of

    • 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

    • What is TrueCrypt?

      What is TrueCrypt?

      TrueCrypt is a free, open source disk encryption software that is available for the Windows XP, Windows Vista, Windows 7, Mac, Linux, and Unix operating systems. TrueCrypt provides users with real time encryption/decryption, parallelization and pipelining to read/write to partitions as fast as non-encrypted partitions, and plausible deniability through hidden volumes and hidden operating systems

    • Cryptanalysis

      Cryptanalysis

      Cryptanalysis is the study of analyzing information systems in order to “discover” or “crack” the hidden or secret aspects of those systems. More specifically, cryptanalysis is the study of breaching cryptographic security systems in order to obtain access to the information contained within encrypted messages without necessarily knowing the cryptographic key used to encrypt the

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