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I’m making an adapter to convert a wired keyboard I have into a wireless keyboard. I am going to use nRF2401 modules for wireless with some STM32 microcontrollers. I’m trying to come up with a method that will prevent playback attacks and … Continue reading Does this seem like a secure way to transfer wireless data from a keyboard to a host?
I’m wondering what is the current knowledge regarding the difficulty of solving the Diffie-Hellman problem (DHP).
Obvisously solving the DLP (discrete log) is harder than solving DHP.
What about the converse :
In a general setting (cyclic… Continue reading Solving Diffie-Hellman vs DLP
Everyone recommends to use the pre-defined ffdhe groups from https://tools.ietf.org/html/rfc7919
There are multiple sources (for example mozilla) where I can download the DH PARAMETERS file but how can I generate it with the information pr… Continue reading How to generate ffdhe from rfc7919
Is there any method to do so? I have access to the application’s assembly in Ghidra as well as app’s TLS 1.2 traffic in Wireshark.
I used Ghidra and found some data about OpenSSL 1.0.2l, but breakpoints on int SSL_connect(SSL *s) function … Continue reading How do I determine which crypto library application uses?
From the cipher suites tls_rsa_with_aes_128_cbc_sha256 and tls_ecdhe_ecdsa_with_aes_128_cbc_sha256 how do I know what will be the RSA , ECDHE, and ECDSA key support in IBM cloud Watson?
here is the link to IBM cipher suites support
Continue reading What will be the key size for rsa, ecdhe and ecdsa from the cipher suite given?
I’m working in IOT team to build a web based IOT system.
I’m using Dataplicity’s Wormhole to host my nodeJS app on raspberry pi. I want to use DHE-RSA symmetric key encryption channel for sending/receiving data from client to server and vi… Continue reading How to use another SSL certificate for DHE-RSA while I already have one with domain?
Over the weekend I was thinking about the problem of scaling various web services. One common practice to scale authorization is to use cryptographically signed tokens. This way when a request comes into your service you don’t need to look… Continue reading Can a secure key-exchange algorithm replace hashing for password authentication?
I am creating a chat app. This app contains private messages and channels. These channels include more than one user.
I want to encrypt messages using AES and to transfer the AES key to users of this channel.
I need a secure transport chan… Continue reading how to encrypt and decrypt messages with more than one sender and more than one receiver?
I want to create a message exchange program. These messages are encrypted with the AES key, and this key is encrypted using the RSA algorithm. When I send a message from User 1 to User 2, I need to request the public key from User 2, do I … Continue reading RSA key exchange
Diffie Hellman is a key exchange algorithm where client and server both generate public and private key, exchange their public key and combine this key with his own private key to generate same secret key.
But, here is a confusion in the i… Continue reading Diffie Hellman implementation- NodeJS