My CEH cheat sheet Adventures in the programming jungleMy CEH cheat sheet. July, 2. 01. 5This is the small and I hope useful cheat sheet for the CEH V8 certification. This is strongly inspired from the CEH Certified Ethical Hacker Bundle, Second Edition book. BasicsBit flipping is one form of an integrity attack. Vba Excel Serial Port Communication' title='Vba Excel Serial Port Communication' />In bit flipping, the attacker isnt interested in learning the entirety of the plaintext message. There are three main phases to a pen test preparation, assessment, and conclusion. Vba Excel Serial Port Communication' title='Vba Excel Serial Port Communication' />Interfacing a Serial Device to a TCPIP network Details how a serial device can be accessed over a TCPIP connection through one of two ways a physical serial device. MSDN Magazine Issues and Downloads. Read the magazine online, download a formatted digital version of each issue, or grab sample code and apps. This download illustrates how to use the groov RESTful API with Microsoft Excel and Visual Basic for Applications VBA. It includes a sample Excel workbook. Electric Blue Tv Series more. How To Install Gpfs Aix. The purpose of this article is to demonstrate how you can perform serial port communication in the VBA Visual Basic Applications script editor included. Black box testing, the ethical hacker has absolutely no knowledge of the TOE. Its designed to simulate an outside, unknown attacker, takes the most amount of time to complete. White box testing, pen testers have full knowledge of the network, system, and infrastructure theyre targeting. Gray box testing, is also known as partial knowledge testing. What makes this different from black box testing is the assumed level of elevated privileges the tester has. Whereas black box testing is generally done from the network administration level, gray box testing assumes only that the attacker is an insider. Attack Types. EC Council broadly defines four attack types categories Operating system attacks Generally speaking, these attacks target the common mistake many people make when installing operating systems accepting and leaving all the defaults. Things like administrator accounts with no passwords, all ports left open, and guest accounts the list could go on forever are examples of settings the installer may forget about. Application level attacks These are attacks on the actual programming codes of an application. Visual Basic for Applications Serial Port Software Example. Visual Basic is used for many control applications, from simple communications, to elaborate test. CCNA Routing and Switching Certification Course Prerequisites. Although CCNA Routing Switching certification exam has no official prerequisites, the Cisco Certified. Windows Serial Communications component library. Developer tools for serial port communications Supports RS232, multidrop RS422 and RS485 ports, virtual serial ports. Although most people are very cognizant of securing their OS and network, its amazing how often they discount the applications running on their OS and network. Many applications on a network arent tested for vulnerabilities as part of their creation and, as such, have many vulnerabilities built into them. Applications on a network are a goldmine for most hackers. Shrink wrap code attacks These attacks take advantage of the built in code and scripts most off the shelf applications come with. These scripts and code pieces are designed to make installation and administration easier, but can lead to vulnerabilities if not managed appropriately. Misconfiguration attacks These attacks take advantage of systems that are, on purpose or by accident, not configured appropriately for security. An asset is an item of economic value owned by an organization or an individual. Identification of assets within the risk analysis world is the first and most important step. Vba Excel Serial Port Communication' title='Vba Excel Serial Port Communication' />A threat is any agent, circumstance, or situation that could cause harm or loss to an IT asset. A vulnerability is any weakness, such as a software flaw or logic design, that could be exploited by a threat to cause damage to an asset. U. S. C 1. 02. 9 and 1. Basically, the law gives the U. S. government the authority to prosecute criminals who traffic in, or use, counterfeit access devices. In short, the section criminalizes the misuse of any number of credentials, including pass words, PIN numbers, token cards, credit card numbers, and the like. Cryptography. Symmetric Encryption The formula for calculating how many key pairs you will need is N N 1 2 where N is the number of nodes in the network. Symmetric algorithms DES A block cipher that uses a 5. DES A block cipher that uses a 1. DES called triple DES can use up to three keys in a multiple encryption method. AES Advanced Encryption Standard A block cipher that uses a key length of 1. DES. IDEA International Data Encryption Algorithm A block cipher that uses a 1. Twofish A block cipher that uses a key size up to 2. Blowfish A fast block cipher, largely replaced by AES, using a 6. RC Rivest Cipher Encompasses several versions from RC2 through RC6. A block cipher that uses a variable key length up to 2,0. RC6, the latest version, uses 1. RC5 uses variable block sizes 3. Asymmetric Encryption. Generally public key encrypt, private key decrypt. Asymmetric algorithms Diffie Hellman Developed for use as a key exchange protocol, Diffie Hellman is used in Secure Sockets Layer SSL and IPSec encryption. Elliptic Curve Cryptosystem ECC Uses points on an elliptical curve, in conjunction with logarithmic problems, for encryption and signatures. Uses less processing power than other methods, making it a good choice for mobile devices. El Gamal Not based on prime number factoring, this method uses the solving of discrete logarithm problems for encryption and digital signatures. RSA An algorithm that achieves strong encryption through the use of two large prime numbers. Factoring these numbers creates key sizes up to 4,0. RSA can be used for encryption and digital signatures and is the modern de facto standard. Hash algorithms MD5 Message Digest algorithm Produces a 1. SHA 1 Developed by the NSA National Security Agency, SHA 1 produces a 1. U. S. government applications. SHA 2 Developed by the NSA, actually holds four separate hash functions that produce outputs of 2. Trust Modelsweb of trust, multiple entities sign certificates for one another. CA at the top that creates and issues certs. Users trust each other based on the CA itself. CA at the top which is known as the root CA, but makes use of one or more intermediate CAs underneath it known as registration authorities RAsto issue and manage certificates. Cryptography Attacks Known plaintext attack In this attack, the hacker has both plaintext and corresponding ciphertext messagesthe more, the better. The plaintext copies are scanned for repeatable sequences, which are then compared to the ciphertext versions. Over time, and with effort, this can be used to decipher the key. Ciphertext only attack In this attack, the hacker gains copies of several messages encrypted in the same way with the same algorithm. Statistical analysis can then be used to reveal, eventually, repeating code, which can be used to decode messages later on. Replay attack Most often performed within the context of a man in the middle attack. The hacker repeats a portion of a cryptographic exchange in hopes of fooling the system into setting up a communications channel. The attacker doesnt really have to know the actual data such as the password being exchanged, he just has to get the timing right in copying and then replaying the bit stream. Session tokens can be used in the communications process to combat this attack. A digital certificate is an electronic file that is used to verify a users identity, providing non repudiation throughout the system. Version This identifies the certificate format. The most common version in use is 1. Serial Number Fairly self explanatory, the serial number is used to uniquely identify the certificate itself. Subject Whoever or whatever is being identified by the certificate. Algorithm ID or Signature Algorithm Shows the algorithm that was used to create the digital signature. Suzuki Game For Pc. Issuer Shows the entity that verifies the authenticity of the certificate. The issuer is the one who creates the certificates. Valid From and Valid To These fields show the dates the certificate is good through. Key Usage Shows for what purpose the certificate was created. Subjects Public Key A copy of the subjects public key is included in the digital certificate. Optional fields These fields include Issuer Unique Identifier, Subject Alternative Name, and Extensions.