Question

我创建了一个程序，使用凯撒密码对文件进行加密，唯一的问题是它不包含大写字母，因为它们不包含在我的列表中。是否可以通过这种方式包含大写字母，或者我需要将所有字符都变为小写？

我当前的代码：

encrypt = str.maketrans('abcdefghijklmnopqrstuvwxyz0123456789', 'ghijklmnopqrstuvwxyz0123456789abcdef')
decrypt = str.maketrans('ghijklmnopqrstuvwxyz0123456789abcdef', 'abcdefghijklmnopqrstuvwxyz0123456789')

filename = "abc_abd.txt"

with open(filename, "r") as readfile:
    with open(filename+'-encrypted.txt', 'w+') as writefile:
        for line in readfile:
            print(line.translate(encrypt), file=writefile)

我希望程序在班次中包含大写字母，但不包括在内。

Answer 1

>>> import string
>>> charset = ''.join(string.ascii_lowercase + string.ascii_uppercase + ''.join([str(i) for i in range(0, 10)]))
>>> charset
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
>>> delta = 6
>>> encrypt = str.maketrans(charset, charset[delta:] + charset[:delta])
>>> decrypt = str.maketrans(charset[delta:] + charset[:delta], charset)

>>> with open(r'C:/Users/Kevin/Desktop/abc_abd.txt') as f1:
...     for line in f1:
...             print(f'Original: {line}')
...             encrypted_line = line.translate(encrypt)
...             print(f'Encrypted: {encrypted_line}')
...             decrypted_line = encrypted_line.translate(decrypt)
...             print(f'Unencrypted: {decrypted_line}')
...
Original: this is a test
Encrypted: znoy oy g zkyz
Unencrypted: this is a test
Original: number 9 in here
Encrypted: tAshkx f ot nkxk
Unencrypted: number 9 in here

请注意，我假设您从这里开始，要实现包括大写字母的功能。另外，我希望您不要在其中存储任何重要内容，无论如何这都不是真正的加密。我认为这不会安全地存储任何内容。

如何解决此凯撒密码包含大写字母的问题？

1 个答案: