Collaborate Disseminate
[Kuba Tyszko] like many of us, has been hacking things from a young age. An early attempt at hacking around with grandpa’s tractor might have been swiftly quashed by his …read more Continue reading SUPERCON 2022: Kuba Tyszko Cracks Encrypted Software
Referring to the AES specification:
https://nvlpubs.nist.gov/nistpubs/fips/nist.fips.197.pdf
Printed pages 35-37…
The first detailed walkthrough is encryption, the second is decryption…. I don’t understand what is the third, "equi… Continue reading What is Inverse equivalent (decrypt) in the AES specification examples? [migrated]
I have this message "Hello from another world"
Can you explain how to encrypt it with CBC step by step?
Are the message characters H, E, L, L, O .. converted to binary first, then every 8 bits or 16 bits XORed with IV and passe… Continue reading can you help me to understand CBC mode encryption [migrated]
I’m confused how to retrieve the remaining 8 bytes of the nonce (to combine with the 4 bytes established during the handshake) to generate the 12 byte IV to decrypt AES 128 GCM.
RFC 5288 "AES Galois Counter Mode (GCM) Cipher Suites fo… Continue reading Where is the 8 byte explicit nonce for decrypting AES GCM within TLS?
Are there any disk/file encryption methods that utilize the TPM2_EncryptDecrypt2 command? All TPM disk encryption tutorials I can find use the TPM to secure the disk encryption key, and not use the TPM to do the actual encryption. I can im… Continue reading disk or file encryption using the TPM2_EncryptDecrypt2 command of the TPM
Is there anything wrong with hashing(with SHA256) the shared secret generated by ECDH that is 384 bits long and using that as the AES key? Is there a difference between that and, say, truncating the 384 bits down to 256.
Edit:
And would th… Continue reading Generating AES 256 key from ECDH P-384
I am writing browser javascript that has a pre-shared key with nonce, and creates a binary websocket connection. How can I apply block encryption-authentication such as AES-GCM to the messages?
Is it possible to tell the browser to skip th… Continue reading javascript: how to apply block cipher to byte stream
I have a 1TB HDD encrypted with BitLocker. It was set up in a way that when I’d boot Windows it would automatically mount it using the key. (I believe it is stored in some kind of .BEK file) I no longer have this Windows install, and I don… Continue reading Recovering the key of a lost BitLocker volume
Choosing a proper nonce is a vital part of every symmetric-key encrypted communication, and it is mandatory that every encrypted message has a unique nonce. It can be shown that using a nonce twice with the same key has such catastrophic e… Continue reading Why do nonce misuse resistant schemes mac the plaintext? [migrated]
The question is what is an appropriate public/private key length in order to encrypt a 256-bit or 512-bit AES key without wasting bytes, and whether long public/private keys provide meaningful increase in security simply from being longer…. Continue reading Max message length when encrypting with public key [migrated]