This library implements functions that generate OTP Tokens based on RFC4226 (HOTP) and RFC 6238 (TOTP). Additionally, the library implements a custom version of HMAC-SHA-1 that serves as a base for ...

The HMAC is an algorithm that generates a hash of the message using a cryptographic hash function and a secret cryptographic key. It can be used to check data for integrity and authenticity. It lets ...

Abstract: This work implements a Hash Message Authentication Code (HMAC) to secure Sampled Values (SV) in the IEC 61850 protocol, addressing cyber-attack vulnerabilities in digital substations. Using ...

I was recently on a test where the client’s API used a custom authentication scheme to add a SHA256 HMAC dynamically on each request, based on the URL, time, and message body. My normal go-to for API ...