Collaborate Disseminate
I want to be able to store data files relating to NFT’s. The files themselves will be stored using IPFS on a central server. I want to give owners of the NFT’s a way to know that the file is authentic.
Based on what I have read, my approac… Continue reading How to verify that a file stored for an NFT is authentic?
Given the following situation:
User makes a request for temporary access to a video
Backend responds with a json file containing timeAllowedInSeconds: 5
Backend also responds with the signature of the json, a 40-character hexadecimal stri… Continue reading How hard is to reverse engineer a signature for a given message?
A program A downloads signed executables and other signed configuration files. Configuration files have a signature appended at the end. To verify their integrity and creator, it uses the public key hardcoded in the program A.
In a couple … Continue reading Designing an updater with certificate renewal in mind
Managing digital certificates, especially expirations and renewals, continues to be a challenging process for businesses of all sizes, a study of over 300 IT professionals in the U.S. and the UK conducted by Opinium reveals. There is also a great deal … Continue reading Managing digital certificates still a challenge, automation lagging
Websites that host downloadable executables often provide measures to confirm the integrity of the data that is available to download. Such measures include:
Hosting the website under HTTPS;
Providing the SHA-256 sum of the downloaded bin… Continue reading How does validating the PGP signature of a downloaded executable against the publisher’s public key show that the binary has not been tampered with?
I am developing Web Application for Certifying Authority as a part of which, I need to generate asymmetric key pair – Private Key and Public Key in user’s smartcard through browser, create Certificate Signing Request (CSR) and send CSR to … Continue reading Web Browser Certificate Enrollment (CSR Generation) and Certificate Download to Smartcard or USB Token
I’m very new to java cryptography. I’m trying to use a .pfx file that contains a public key, it’s private key and a digital certificate to sign a text file. I have been able to access the private key and certificates by loading the .pfx fi… Continue reading Signing a text file using a pfx file in java [closed]
I need to verify a MAC for something signed with HMAC-SHA512/256, however, the language I’m using (Salesforce’s Apex language) doesn’t have support for that algorithm. It does have HMAC-SHA512 and HMAC-SHA256 though – is there a way to tra… Continue reading Is it feasible to calculate an HMAC-SHA512/256 MAC from an environment that only supports HMAC-SHA512?
The following situation:
I have a web app (stateless) Users are connected the web app using
WalletConnect to connect their Ethereum Wallet. Cannot therefore not use any API keys or tokens
there is a server side REST API GET /account
I wan… Continue reading Use an Ethereum signature for API GET authentication
Due to the burgeoning requirement for smooth digital transaction management and user authentication, the demand for digital signatures is rising rapidly. Moreover, the increasing acceptance of online transactions and payment procedures, and surging dig… Continue reading Digital signature market to grow steadily by 2030