Enhancement of digital signature algorithm in bitcoin wallet

Abstract

Bitcoin is a peer-to-peer electronic cash system largely used for online financial transactions. It gained popularity due to its anonymity, privacy, and comparatively low transaction cost. Its wallet heavily relies on Elliptic Curve Digital Signature Algorithm (ECDSA). Weaknesses in such algorithms can significantly affect the safety and the security of bitcoin wallets. In this paper, a secure key management wallet was designed based on several changes in the wallet parts. In the cold wallet, we employed an image-based passphrase to achieve a strong entropy source of master seed. The hot wallet, the proposed key_ Gen algorithm is modifying to the key generation step of the ECDSA that it is to generate a fresh key pair at each transaction. The final part ensures recovering all keys on both hot and cold wallets without daily backups in case of losing the wallet. The findings prove that the proposed cold wallet is resisting against a dictionary attack and overcoming the memorizing problem. The proposed hot wallet model acquires good anonymity and privacy for bitcoin users by eliminating transaction likability without additional cost. The execution time for signing a transaction of the proposed model is~70 millisecond, which is then important in the bitcoin domain.

An Optimized Edward-elgamal Extreme Performance Signature Scheme Oedecas in Iot and Blockchain

“…Keys, encryption, decryption, and digital signatures are all areas where ECC finds extensive use. [26] improved performance on the target platform by employing a twisted Edwards curve variant. Digital signatures generated with EcDSA require double scalar multiplication to be verified.…”

Новий Підхід Генерації Мнемонічних Фраз На Основі Медіа Файлів

“…Безпека мнемонічних фраз-паролів [1] значною мірою залежить від міцності початкової фрази, яка часто генерується за допомогою генератора псевдовипадкових чисел (PRNG) [2]. У цій статті запропоновано новий підхід до генерації мнемонічних парольних фраз із використанням медіафайлів як джерела випадковості.…”

An empirical study to demonstrate that EdDSA can be used as a performance improvement alternative to ECDSA in Blockchain and IoT

“…ECC is widely used for keys, encryption, decryption and digital signatures. [21] used a twisted Edwards curve variant and demonstrated performance improvement on target platform. Verification of digital signature from ECDSA requires double scalar multiplication.…”