DES( Data Encryption Standard)算法,于1977年得到美國政府的正式許可,是一種用56位密鑰來加密64位數據的方法。DES算法以被應用于許多需要安全加密的場合。(如:UNIX的密碼算法就是以DES算法為基礎的)。
標簽: Encryption Standard Data DES
上傳時間: 2013-12-23
上傳用戶:腳趾頭
DES( Data Encryption Standard)算法,于1977年得到美國政府的正式許可,是一種用56位密鑰來加密64位數據的方法。DES算法以被應用于許多需要安全加密的場合。(如:UNIX的密碼算法就是以DES算法為基礎的)。
標簽: Encryption Standard Data DES
上傳時間: 2015-04-15
上傳用戶:邶刖
數字運算,判斷一個數是否接近素數 A Niven number is a number such that the sum of its digits divides itself. For example, 111 is a Niven number because the sum of its digits is 3, which divides 111. We can also specify a number in another base b, and a number in base b is a Niven number if the sum of its digits divides its value. Given b (2 <= b <= 10) and a number in base b, determine whether it is a Niven number or not. Input Each line of input contains the base b, followed by a string of digits representing a positive integer in that base. There are no leading zeroes. The input is terminated by a line consisting of 0 alone. Output For each case, print "yes" on a line if the given number is a Niven number, and "no" otherwise. Sample Input 10 111 2 110 10 123 6 1000 8 2314 0 Sample Output yes yes no yes no
上傳時間: 2015-05-21
上傳用戶:daguda
源代碼\用動態規劃算法計算序列關系個數 用關系"<"和"="將3個數a,b,c依次序排列時,有13種不同的序列關系: a=b=c,a=b<c,a<b=v,a<b<c,a<c<b a=c<b,b<a=c,b<a<c,b<c<a,b=c<a c<a=b,c<a<b,c<b<a 若要將n個數依序列,設計一個動態規劃算法,計算出有多少種不同的序列關系, 要求算法只占用O(n),只耗時O(n*n).
上傳時間: 2013-12-26
上傳用戶:siguazgb
The government of a small but important country has decided that the alphabet needs to be streamlined and reordered. Uppercase letters will be eliminated. They will issue a royal decree in the form of a String of B and A characters. The first character in the decree specifies whether a must come ( B )Before b in the new alphabet or ( A )After b . The second character determines the relative placement of b and c , etc. So, for example, "BAA" means that a must come Before b , b must come After c , and c must come After d . Any letters beyond these requirements are to be excluded, so if the decree specifies k comparisons then the new alphabet will contain the first k+1 lowercase letters of the current alphabet. Create a class Alphabet that contains the method choices that takes the decree as input and returns the number of possible new alphabets that conform to the decree. If more than 1,000,000,000 are possible, return -1. Definition
標簽: government streamline important alphabet
上傳時間: 2015-06-09
上傳用戶:weixiao99
電力系統在臺穩定計算式電力系統不正常運行方式的一種計算。它的任務是已知電力系統某一正常運行狀態和受到某種擾動,計算電力系統所有發電機能否同步運行 1運行說明: 請輸入初始功率S0,形如a+bi 請輸入無限大系統母線電壓V0 請輸入系統等值電抗矩陣B 矩陣B有以下元素組成的行矩陣 1正常運行時的系統直軸等值電抗Xd 2故障運行時的系統直軸等值電抗X d 3故障切除后的系統直軸等值電抗 請輸入慣性時間常數Tj 請輸入時段數N 請輸入哪個時段發生故障Ni 請輸入每時段間隔的時間dt
上傳時間: 2015-06-13
上傳用戶:it男一枚
本程序的實現des加解密的功能,每次對64位的密文進行加密, 從而實現對所有的文件的加解密.
上傳時間: 2014-08-10
上傳用戶:
三重DES加密,其中Key為8個字節共64位,是DES算法的工作密鑰;Data也為8個字節64位,是要被加密或被解密的數據;Mode為DES的工作方式
上傳時間: 2013-12-16
上傳用戶:lanjisu111
由于BT老師的要求,非要將64位DES算法改編成16位的DES算法,小生在這里獻丑了。
標簽:
上傳時間: 2014-01-21
上傳用戶:372825274
用AVR單片機ATMega32通過U2270B讀取H4001只讀RFID卡號的范例,H4001卡有關信息,采用曼切斯特編碼,125Khz,RF/64,位周期512uS,激光編程64位ID。
上傳時間: 2013-12-23
上傳用戶:開懷常笑