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27 Ιαν 2012 · You'll need to set the cipher mode to CipherMode.ECB or use an IV. SymmetricAlgorithm symmetricAlgorithm = DES.Create(); symmetricAlgorithm.Key = new byte[8] { 1, 2, 3, 4, 5, 6, 7, 8 }; symmetricAlgorithm.Mode = CipherMode.ECB; ... Another point is not to use Unicode encoding. Use Base64 instead. Unicode might "destroy" bytes that are not UTF-16.
15 Δεκ 2012 · I made a simple class that handles lowercase, uppercase and numbers. It uses the StringBuilder class to make the output. To decode a string, you would use the opposite shift (if you encrypt with shift = 2, decrypt with shift = -2).
The encryption of Caesar cipher can be represented using modular arithmetic by first transforming the letters into numbers, according to the scheme, A = 0, B = 1,..., Z = 25. Encryption of a letter x by a shift n can be described mathematically as, Decryption is performed similarly, Example:
11 Νοε 2021 · Symmetric key cryptography has two method types, which are used to convert plain text to ciphertext: block ciphers and stream ciphers. Block ciphers use the algorithm mode of Electronic Code Block ( ECB ) and Cipher Code Block ( CBC ).
26 Μαρ 2024 · AES (Advanced Encryption Standard) is a symmetric block cipher algorithm that encrypts fixed-length blocks of data (128 bits). AES uses the same key to encrypt and decrypt data. Key sizes can...
17 Αυγ 2019 · Have you ever wanted to encrypt some sensitive data? Then you have probably came across various articles about AES (Advanced Encryption Standard). As of August 2019, AES is still the recommended algorithm to use so let’s look at how you can use it. Intro and a little bit of theory.
5 Νοε 2016 · The Caesar Cipher involves replacing each letter of the alphabet with the letter – standing places down or up according to the key given. Suppose “M” is the plaintext and the key is given as 4, then you get the Ciphertext as the letter “Q”. In a similar way “A” is the plaintext then Ciphertext will be – “E”.
