xor operation

Method 1:Encryption-(NSString *) obfuscate: (NSData *) string Withkey: (NSString *) key{NSData *data = string;Char *dataptr = (char *) [data bytes];char *keydata = (char *) [[key datausingencoding:nsutf8stringencoding] bytes];char *keyptr =

We know that bit operations are widely used in computing. Bit operations are also an essential operation in various programming languages of the computer, especially in the lower-level implementation code of the computer. Let's take a look at the

Three attack methods bypass Cisco TACACS + Original article: 3 attacks on cisco tacacs bypassing In this article, the author introduces three methods to bypass TACACS on Cisco devices.No.1 DoS attacks bypass Cisco TACACS + No. 2 Local cracking PSK

Practice ^ operator and practice Operator [Instance description] In this example, the key point is to use the exercise ^, which has no technical content. Haha .. Before introducing an instance, let's take a short look at the concept of

Link New Ket OJ: A number that appears only once in an array Nine degrees oj:http://ac.jobdu.com/problem.php?pid=1351 GitHub code: 040-only one occurrence of a number in an array Csdn: Sword refers to a number that appears only

I played with the package for one night the night before, so I started to talk about my discovery for the first time (with the package for the first time ).I used WPE to intercept packets directly, because Kingsoft game itself has protective

It is proved by mathematics that there is an encrypted password that will not be cracked if used correctly, but there is no chance to use it now. This is the one-time key (one-time pad) introduced by the author ). From our experience, a certain

Valid information group polynomial to encode: M (x)Generating a polynomial (polynomial that produces a check code): G (x)Remainder polynomial: R (x)Quotient: Q (x)The polynomial is generated four times, so a polynomial divided by the formula to

RAID 5 is a storage solution that combines storage performance, data security, and storage costs. For example, RAID 5, which consists of four hard disks, is stored in data Mode 4: In the figure, P0 is the parity information for D0,D1 and D2, P1 is

"Problem: Given unsigned integer data, you need to flip its bits (flipped by the center image)" There are a number of workarounds for this problem, and here are some tips for solving this problem using XOR (XOR) operations. Tip: How do I exchange

A Introduction to Idea algorithmIDEA (International Data encryption Alogrithm) was presented by Xuejialai and James L.massey of the Federal Institute of Technology in Zurich, Switzerland, in 1991. IDEA uses a 128-bit key, the entire algorithm and

1. symmetric encryption Algorithm 1.1 definition raw data Span style= "font-family: the song Body;" >) and encryption key Span style= "font-family: the song Body;" > (mi yue key and the inverse algorithm of the same algorithm to decrypt the

Use Java open-source project joone to implement artificial intelligence programming (2) 2008-06-30 Text/Zhu Xianzhong Compilation Training Neural Networks To achieve the purpose of this article, we will guide joone to identify a very simple

IntroductionFew programmers are not attracted to artificial intelligence programming either here or there. However, many programmers who are interested in AI quickly fall behind due to the complexity of the algorithms they contain. In this article,

Basic knowledge: 1. And (&) Operations (bitwise AND)The and operation is usually used for bitwise operations. For example, the result of a number and 1 is the last bit of the binary. This can be used to judge the parity of an integer. the last bit

When it comes to language learning and programming, the most common way to exchange two variables is by using the new variable temp, the following code:----------------------------------------------------------------------------------int a = 3, b = 4

Question one:Given a positive integer n, the first bit 1 in the binary form (order from low to high) is obtained.For example, given a positive integer of 12, its low 8-bit binary representation is: 00001100From low to high order, the first 1 appears

mysql| Encryption | algorithm | arithmetic The previous section of the summary describes how to encrypt/decrypt using the XOR operation, which is used to encrypt the user's logon information. Based on the principle of the XOR encryption algorithm

The BitBlt of MFC functions//Cgame123view DrawingvoidCgame123view::ondraw (cdc*PDC) {Cgame123doc* PDoc =getdocument (); Assert_valid (PDOC); if(!PDoc)return; //TODO: Add drawing code here for native dataCRect Rect; GetClientRect (&Rect); //Screen

bit arithmeticThe operation component of a bitwise operation can only be integer or character data, and the bitwise operation considers the operand as a bit string information composed of binary bits, and completes the specified operation by bit,