2012年4月1日 · An interesting thing about some modern standardized ciphers, like AES, is that the government is "eating its own dogfood" by using them internally. (AES 192 and 256 are approved for top-secret data.) Back in the day (up through the 90s), U.S. government internal encryption standards was not closely aligned with public sector cryptography, and ...

Therefore AES-256 is the golden standard in the industry with only 40% performance penalty when compared to AES-128. Always use AES-256 with a good mode of operation for your target security. That explains why we are using 256-bit keys to encrypt top secrets. But latest practical attack on AES shows brute-forcing AES-256 take $2^{100}$ operations.

2017年11月17日 · @script8man - there is a much higher chance of an implementation flaw in a common AES toolset than in the underlying algorithm itself. The maths behind AES is viewed to be unbreakable with modern technology. Of course if parameters are chosen badly by buggy software anything encrypted with that software may be breakable. –

2022年7月21日 · AES-256 GCM is compared to AES-256 CBC + some authenticator (e.g. CBC-MAC with a derived key) Authentication tag : it's part of the ciphertext, in clear. It usually is at the end, and must be for a so-called "online algorithm", since the tag becomes known to the sender only after the whole plaintext was processed.

2012年9月13日 · Use ZipCrypto, if you want to get archive compatible with most of the ZIP archivers. AES-256 provides stronger encryption, but now AES-256 is supported only by 7-Zip, WinZip and some other ZIP archivers. So really there is some balance to be played with.

Before answering your questions: GCM is an authenticated encryption mode of operation, it is composed of two separate functions: one for encryption (AES-CTR) and one for authentication (GMAC). It receives as input: a Key; a unique IV; Data to be processed only with authentication (associated data) Data to be processed by encryption and ...

2017年3月22日 · I am encrypting large file sizes (>1GB) using AES encryption with a key size of 256 and over a 1000 hash iterations. To make the program memory efficient I'm reading the file from the stream, chunk by chunk (of specific buffer lengths) and encrypting them.

2017年10月29日 · I heard that the fastest method to crack an AES-128 encryption, or and AES-256 encryption is by brute force, which can take billions of years. But I can't help thinking there's got to be a faster way. Because the AES encryption scrambles the data contained in a zip file, the password could be found by unscrambling that data correctly.

2022年1月21日 · The meaningful explanation is SHA-384 is chosen to have 128-bit collision resistance that fits 128-bit resistance of the AES-256. In a simplified manner one can say that AES_256_GCM_SHA384 has 128-bit security against Quantum adversaries.

2022年11月6日 · Keys for AES-256 can easily be created manually. Any 256 bit long bit sequence can be used as an AES-256 key. You don't have to use any generators and create a valid key manually. Human generated keys have usually less entropy than the generated by some quality random generator that is based on quality entropy source, that's why it is ...