A one-time pad is a form of encryption that is difficult to decipher or crack if one is not the intended recipient. If done correctly, the strength of encryption of plaintext can almost be impossible to break in a useful timeframe. The system takes each character from plaintext and uses modular addition with a character …
The Diffie-Hellman key exchange was first published by Whitfield Diffie and Martin Hellman in 1976 and is a popular method for exchanging cryptographic keys. The method is one of the most straight-forward examples of key exchanges implemented in the cryptology field and allows two individuals or parties that have not worked together before to establish …
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 …
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 …
Microsoft Access had no encryption capability until the release of Microsoft Access 2007. With the MS Access 2007 release, encryption is now available. Encryption Requirements To encrypt your access database you must use a new database format released with MS Access 2007, the ACCDB format. Differences between the original MDB format and the new ACCDB …
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. …
Kerberos is a network authentication protocol which utilizes symmetric cryptography to provide authentication for client-server applications. Kerberos Standard Definition Kerberos is defined in RFC 1510 – The Kerberos Network Authentication Service (V5). Kerberos Architecture The core of Kerberos architecture is the KDC (Key Distribution Server). The KDC stores authentication information and uses it to securely …
In the study of cryptography the terms plaintext and ciphertext are used to describe the plain language message or information and the resulting encrypted message or data that results from the use of a cipher or encryption algorithm. The resulting ciphertext is not readable by either a human or computer without the correct cipher to …
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 …
DES (Data Encryption Standard) is a commonly used method for encrypting data using a secret or private key. The strength of the DES encryption standard was previously considered to be strong enough that the United States government placed restrictions on the export of the technology to other countries. Conceptually, there are more than 72 quadrillion …