We are currently implementing envelope encryption for our app. That means, we need to derive a key from a user’s password, which then will be used as a key encryption key(KEK) to wrap another key using the AES-KW algorithm. Basically, on o…
I’ve read a lot of materials(including other related questions in this site) and seen many people lay out the mathematical formulas. I have a decent background in math, so I understand how long it would take and how difficult it is, mathem…
"The KeyUpdate handshake message is used to indicate that the sender is updating its sending cryptographic keys."
"If the request_update field is set to "update_requested", then the receiver MUST send a KeyUpdate o…
The ssh-keygen command to generate the pair of keys files can use the -t option. According to Ubuntu Noble’s man ssh-keygen for the mentioned option, it indicates:
-t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa
Specifi…
I created a private key using Analog device’s signtool. It can be found part of "CrossCore Embedded Studio for Blackfin, SHARC and SHARC+ – Release (Rev. 2.12.0)". Link: https://www.analog.com/en/resources/evaluation-hardware-and…
I am attempting to perform real time decryption of TLS 1.3 packets (TLS_AES_256_GCM_SHA384). I have retrieved the mastersecrets for the specific flow by using uprobes on OpenSSL, and matched the mastersecrets to the flow using ClientRandom…
Context
I’ve used OpenSSL to encrypt some socket communications.
I am however using some functionality from the windows API that prevents me from using OpenSSL’s opaque builtin sockets, so I am buffering through their BIO_s_mem interfaces …
For key1.pem, I am using WSL and OpenSSL. First I generate the an RSA private key used for signing with this exact command:
openssl genrsa -aes256 -out private.key 1024
Then I create a certificate and private key using this command:
opens…
I have a textbook that contains the following problem:
In practice, one master key, KM, is exchanged in a secure way (e.g. Diffie-Hellman key exchange) between the involved parties. Afterwards, session keys, kx, are regularly updated by u…
In a recent ssh -vv output, I saw OpenSSH mentioning a private key file id_xmss.
XMSS is defined in RFC 8391, "XMSS: eXtended Merkle Signature Scheme", May 2018.
OpenSSH has experimental support for XMSS since version 7.7 (2018-0…
