Quantum Computing on

Cryptographic Algorithm

Quantum Computer

AES

Symmetric

key

Encryption

Larger key sizes needed

SHA-2, SHA-3

N/ A

Hash

Functions

Larger Output Needed

RSA

Public key

Signatures,

K ey

establishment

No longer secure

ECDSA, ECDH (Elliptic

Curve Cryptography

Public key

Signatures,

K ey

Exchange

No longer secure

DSA (Finite Field

Cryptography)

Public key

Signatures,

K ey

Exchange

No longer secure

Table 2.1: Q uantum computing impact on cryptographic algorithm

Benefits

It is the 21st-century clearing house giving Efficiency: There is no need

to reconcile data and smart contracts to speed up payment.

Transparency: enables you to get a real-time view of trade and computer-

coded smart contracts.

Resilience: is the number of copies

Governance and trust: provides crowdsource honesty, one event one

version, no need for third-party, tech failure is taken care-of

Blockchain benefits

The benefits of blockchain include:

Saves time: the transaction time is reduced from days to near-instantaneous

Removes cost: overheads and cost intermediaries

Reduces risk: tampering, fraud, and cybercrime

Increases trust: through shared processes and recordkeeping

Speeding up transactions-processing of transaction-cutting cost and

complexity-increased resilience.