Crypto

Quantum attack computation cost estimate on bitcoin, ether drops by more than half in two months

Estimates for the core computation cost of a potential quantum-computer attack targeting bitcoin and ethereum have fallen to less than half of previous levels. The work focused on optimising parts of Shor\'s algorithm used to attack secp256k1, a cryptographic scheme shared by both networks. Researchers stressed this does not mean either system can be cracked with current quantum computers, but the faster-than-expected decline in costs is sharpening calls to bring forward security transitions.

Finance

Kakao moves to sway retail shareholders as rationale for spin-off put to test

Kakao will directly brief retail shareholders to address concerns over its planned corporate spin-off. The move follows a share price slide since the plan was announced and growing opposition from individual investors and the labour union ahead of an extraordinary shareholders meeting on Dec. 17. Kakao will hold an online meeting on Sept. 16 to explain the outline, background and expected effects of the spin-off and take questions.