Python 實現 XECryption algorithm 加密和解密
阿新 • • 發佈：2020-11-23
這是從公司的執行長傳送給首席生態督察塞繆爾史密斯。然而，它是加密的，我似乎不能解碼它使用任何我的基本解密工具。我已經縮小到用於加密的演算法，但它超出了我的範圍。我希望你能看看。 這是一封信 ：
| I believe this document to be encrypted using theXECryption algorithm. Please recover the original text of this document and return it to me. .296.294.255.268.313.278.311.270.290.305.322.252.276.286.301.305.264.301.251.269.274.311.304. 230.280.264.327.301.301.265.287.285.306.265.282.319.235.262.278.249.239.284.237.249.289.250. 282.240.256.287.303.310.314.242.302.289.268.315.264.293.261.298.310.242.253.299.278.272.333. 272.295.306.276.317.286.250.272.272.274.282.308.262.285.326.321.285.270.270.241.283.305.319. 246.263.311.299.295.315.263.304.279.286.286.299.282.285.289.298.277.292.296.282.267.245.304. 322.252.265.313.288.310.281.272.266.243.285.309.295.269.295.308.275.316.267.283.311.300.252. 270.318.288.266.276.252.313.280.288.258.272.329.321.291.271.279.250.265.261.293.319.309.303. 260.266.291.237.299.286.293.279.267.320.290.265.308.278.239.277.314.300.253.274.309.289.280. 279.302.307.317.252.261.291.311.268.262.329.312.271.294.291.291.281.282.292.288.240.248.306. 277.298.295.267.312.284.265.294.321.260.293.310.300.307.263.304.297.276.262.291.241.284.312. 277.276.265.323.280.257.257.303.320.255.291.292.290.270.267.345.264.291.312.295.269.297.280. 290.224.308.313.240.308.311.247.284.311.268.289.266.316.299.269.299.298.265.298.262.260.337. 320.285.265.273.307.297.282.287.225.302.277.288.284.310.278.255.263.276.283.322.273.300.264. 302.312.289.262.236.278.280.286.292.298.296.313.258.300.280.300.260.274.329.288.272.316.256. 259.279.297.296.283.273.286.320.287.313.272.301.311.260.302.261.304.280.264.328.259.259.347. 245.291.258.289.270.300.301.318.251.305.278.290.311.280.281.293.313.259.300.262.315.263.319. 285.282.297.283.290.293.280.237.234.323.289.305.279.314.274.291.309.273.294.249.283.262.271. 286.310.305.306.261.298.282.282.307.287.285.305.297.275.306.280.292.291.284.301.278.293.296. 277.301.281.274.315.281.254.251.289.313.307.244.256.302.301.317.305.239.316.274.277.296.269. 305.301.279.287.317.284.277.305.298.264.304.286.273.275.293.309.286.282.240.287.239.268.269. 267.315.311.292.270.271.272.336.282.237.275.316.306.239.305.314.240.296.306.270.247.245.302. 317.316.241.291.310.266.274.274.313.288.262.319.280.276.238.297.295.287.285.288.301.272.275. 247.305.292.286.272.310.291.301.322.256.315.298.263.281.276.237.294.284.296.284.302.273.298. 287.298.301.265.305.270.315.278.283.302.287.263.270.345.258.270.266.302.309.262.260.277.327. 263.277.254.283.276.239.272.264.276.279.264.267.298.264.244.245.273.292.289.273.248.259.263. 288.290.294.210.288.268.311.318.312.242.285.293.216.262.276.340.292.299.275.259.293.311.234. 266.294.278.307.286.267.307.285.269.310.288.274.270.326.273.276.311.304.267.302.318.265.299. 263.283.248.257.314.288.321.321.236.284.283.227.320.312.246.261.289.316.288.263.312.241.265. 288.298.286.287.274.306.279.276.289.307.303.293.281.298.317.252.312.283.278.263.304.305.258. 266.270.294.286.293.290.291.291.258.254.282.282.283.313.268.282.316.310.299.254.264.234.296. 270.265.326.288.292.293.321.305.250.320.299.253.270.296.297.298.266.312.234.273.287.309.286. 278.269.279.316.284.276.234.293.255.267.242.253.318.270.246.278.292.285.282.314.266.292.286. 263.313.249.290.255.289.264.292.301.299.278.291.292.225.250.261.283.303.262.264.264.303.299. 297.274.288.267.293.316.320.317.233.303.258.302.271.283.323.247.279.268.312.269.297.313.280. 280.273.266.332.276.313.284.281.316.279.290.273.313.308.305.260.302.306.273.234.279.281.284. 298.278.259.290.314.275.264.339.293.322.266.261.296.306.277.275.311.284.270.318.259.249.286. 292.301.285.280.303.283.287.299.277.273.293.228.311.283.272.304.292.277.271.306.302.278.298. 300.287.281.309.243.272.279.282.300.291.295.284.285.252.291.251.285.283.245.250.252.318.298. 277.235.288.259.263.278.274.307.261.260.350.250.288.256.282.316.261.285.295.292.300.298.264. 245.241.308.301.261.253.289.264.267.300.262.248.287.257.266.275.287.297.320.287.264.279.297. 232.231.256.288.243.252.277.274.245.256.253.229.290.263.305.278.260.294.312.283.301.275.276. 299.297.312.275.282.294.272.228.302.324.257.261.286.326.280.283.316.294.254.258.275.264.236. 240.277.255.231.258.286.242.277.253.296.290.250.314.320.239.292.313.261.294.261.317.273.285. 236.292.282.271.264.297.300.272.308.299.300.269.301.269.317.284.286.262.315.276.279.328.269. 254.252.232.272.268.309.273.264.296.305.272.267.291.324.302.297.268.268.263.298.300.261.312. 241.254.299.280.263.292.260.301.311.317.297.248.314.272.293.298.281.298.276.311.291.297.318. 261.274.300.293.297.267.295.261.275.334.289.238.267.289.283.257.300.262.304.311.278.274.265. 261.345.301.296.270.273.299.289.274.272.313.282.268.320.287.320.270 |
上面是加密內容：
先看加密實現：
import random def jiami(shuju,miyao): if miyao == '': zhi = [] for i in shuju: ascii_he = ord(i) a = random.randint(0, ascii_he) b = random.randint(ascii_he - a, ascii_he) c = ascii_he - a - b he = '.' + str(a) + '.' + str(b) + '.' + str(c) zhi.append(he) zhi= ''.join(zhi) with open('jiami_jieguo.txt','w') as f: f.write(zhi ) print(zhi) else: zhi = [] t = 0 for i in miyao: t = t + ord(i) for i in shuju: ascii_he= ord(i) ascii_he = t + ascii_he a = random.randint(0, ascii_he) b = random.randint(ascii_he - a, ascii_he) c = ascii_he - a - b he = '.' + str(a) + '.' + str(b) + '.' + str(c) zhi.append(he) zhi = ''.join(zhi) with open('jiami_jieguo.txt', 'w') as f: f.write(zhi) print(zhi) #shuru = input('請輸入加密值：') miyao = input('請輸入金鑰：') with open('加密.txt','r') as f: shuru = f.read() jiami(shuru,miyao)
可以選擇金鑰加密或者不選擇金鑰加密。
下面看下解密實現：
def jiemi(shuju): t= shuju.split('.') t.pop(0) step = 3 b = [t[i:i + step] for i in range(0, len(t), step)] heji = [] for t in range(len(b)): numbers = [int(x) for x in b[t]] he = sum(numbers) -762 # 這裡762是自己推算的金鑰值。 因為這是一封英文信 字母最大不超過z 每個數值都是三位數 加了金鑰的 合算ascii的值。 he= chr(he) #print(b[t]) #print(he) heji.append(he) print(min(heji)) print(max(heji)) heji=''.join(heji) print(heji) #print(b) #print(b) with open('xceryption_jiami.txt.txt','r') as f: t= [] for line in f.readlines(): line = line.strip('\n') t.append(line) t=''.join(t) jiemi(t) #print(t)
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最後看下這封信的解密內容：
y
Samuel Smith
Thank you for looking the other way on the increased levels of toxic chemicals in the river running alongside our industrial facilities. You can pick up your payment of $20,000 in the mailbox at the mansion on the corner of 53 and St. Charles tomorrow between the hours of 3:00am and 5:00am.
Thank you,
John Sculley
ToxiCo Industrial Chemicals
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