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Can someone help me know what encryption type is this?
CpDUtTwxcAo=
At first I thought it was base64 but base64 ends with ==
CpDUtTwxcAo= is Base64 encoded data and decodes to binary, in hex: 0A 90 D4 B5 3C 31 70 0A. Base64 is generally used to encode binary data to ASCII characters.
Note: Base64 is an encoding, not encryption.
See Base64 for more information.
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Suppose you are told that the stream cipher encryption of the message “attack at dawn" is 6c73d5240a948c86981bc294814d (the plaintext letters are encoded as 8-bit ASCII and the given ciphertext is written in hex). What would be the stream cipher encryption of the message “attack at dusk" under the same key?
Stream cipher is a bitwise encryption, so changing one bit in plaintext will change one bit in ciphertext. So the ciphertext of "attack at dusk" should be 6c73d5240a948c86981bc294814k
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so I've been trying to figure out what this is for a while:
MzggMTAgMTA=
is it base64? Or a hash?
It looks so familiar to me but I can't find what it is...
Thanks and sorry if my question is silly, I am a beginner, thank you!
My rule of thumb is, if there's a = or even two at the end, then it's Base64 encoded. In this case, the decoded message of your text is "38 10 10".
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I have these two encoded strings but I can't figure it out what type of encryption was used to encode:
lgGggAJp03czFtABAQAbAGlzU2FsZT1GYWxzZSNwcm9kdWN0SWQ9MTAwMQEBARXgQOoQm2IxgpYaAMcu5PS9BxkOQ7H6ezQsZZ4LjqHl5qOQgJQAESr3N5xVvZ5MCg==
and this:
b/d19ASvboAn5QBDCVieHoNTokXm0EaJKcSfrgwPlKykTKcIf7hhAibrCYuP0fK8dLH0SKvF6JWuZUftc7bG8wsVhn1uHX5Q4A6VR3POJ8zdbhiHkTcgQwG8wYYpsP3Vn8hLuoOrZbj6FAqO76GkrBYVfDYyF7GYHXdtBZQm4Dk=
I used base64 but it doesn't work.
Looks like Base64 to me. Any time I see encoding ending with '=' or '==' it is my first guess. I can see 'sales' and 'product id' after decoding your first example though it isn't completely readable. May be double encoded or have other non-printable characters as field delimiters. Hopefully this gets you heading in the right direction.
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Basically I tried a lot of different decryption but I can't find it.
I am pretty sure it is an encryption method and not a hash, since the data has to be used.
They are all 44 characters long and end with =
Examples:
5yFKMmoA+QNC1ch4islRw2l11jHkUD7xrhN2g4v+lok=
6n08mzA1AwzSQHkw9pLVg/AqjDlgz7gUFCDbnSX6irI=
Y7ewexuPNgRAf2sz3qQ26by2p1M2fQ8z6NaM5mniWkg=
Seems that are Base64-encoded 33-byte strings (44*6=264/8=33).
See: http://en.wikipedia.org/wiki/Base64
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Is it considered correct in order to do a binary or hexadecimal operation to convert to decimal, do the operation, and then convert back to the original numeral system?
Is the above not advised?
Is the above frawned upon?
The context is a (first year) Programming Open University Course and the guide (in lack of a better word to describe him) is delaying my enquiry.
Yes, it's generally correct. Numbers are numbers, no matter how you represent them as text. Note that binary, decimal, and hexadecimal are all text representations of numbers.