I'm a cryptography researcher and PhD student in computer science at University of Central Florida (UCF) under direction Dr. Cliff Zou since Fall 2016.

My research interests are blockchain, cryptocurrency and cryptography. Currently, I'm working to determine Crypto Wallet challenges and find secure solutions. My goal is building a secure yet convenient crypto wallet.

Before joining UCF, I worked for private companies in Public Key Infrastructure and Smart (IC) Card.

Hossein Rezaei

rezaei at knights dot ucf dot edu

Department of Computer Science
University of Central Florida
4328 Scorpius St,
Orlando, FL 32816


PhD in Computer Science

University of Central Florida (Aug 2016 – Expected Jan 2020, Orlando, US)
Thesis: Improving Security of Crypto Wallets in Blockchain Technologies

MSc in Computer Science

University of Central Florida (Aug 2016 – Dec 2017, Orlando, US)

MSc in Software Engineering

Qazvin Azad University (Sep 2005 – Mar 2008, Iran)
Thesis: PC Secure Bootstrapping

BSc in Hardware Engineering

Qazvin Azad University (Sep 2001 – Sep 2005, Iran)
Thesis: Efficient Implementation of RSA Cryptography Engine and PKCS#1


Selected peer-reviewed papers


University of Central Florida (Graduate Teaching Assistant)

• Security in Computing (Fall 2016, Spring 2017, Fall 2019)
• Computer Architecture Concepts (Fall 2018, Spring 2019)
• Database Concepts (Fall 2017, Spring 2018)

Qazvin Azad University (Instructor)

• Programming Languages (Fall 2010, Iran)

Takestan Azad University (Instructor)

• Operating Systems (Fall 2005, Iran)
• Programming Languages (Fall 2005, Iran)



A new secure crypto wallet that supports cryptographic backup, super-wallet/sub-wallet model and secure inquiry.
https://github.com/hosseinpro/bitaWallet (Private Repository)


A java script library to use smart card in web including an online tool, a local bridge and a java card simulator template.


Java card implementation for secure smart card signing with time-based digital Signature.

LedgerNanoS Hack

The basic code to sniff and hack Ledger Nano S crypto wallet. This hack is successful on the wallet, but the Bitcoin SegWit prevents this hack.


A spyware tool for sniffing user's PIN and altering user's digital signature in PIV smart card on Microsoft Windows.

Thanks to Vasilios Mavroudis for website template