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The listed page talks about AES-128-CBC encryption with Encrypt-then-MAC Mac with HMAC. The user's obligation is to provide the message, 256-bit uniform random key, and a time stamp. The Fernet splits the 256 bits of the key into two equal-sized parts. First, part is used in the encryption of the message with AES-128-CBC, then the authentication tag $t$  t ...

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AES stick guide is a nice introduction starting from low level to higher level. Also, I suggest reading the Rijndael book after that. The Design of Rijndael: The Advanced Encryption Standard (AES) 2nd edition This is the second edition after almost 20 years of the first edition. There is a great deal of everything from math to why did they choose the simple ...

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In real-life situations, except for compatibility with existing systems, it seldom should be directly used any of the encryption modes listed in the question, because they at best provide secure encryption (caveat: ECB does not), which does not cover the needs of most real-life situations. In real applications, if one needs encryption, one also typically ...

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