why is double-spend not an issue for payment channels?

Micropayment Channels (MPC) cannot be used currently because of transaction malleability, I hear.

AFAIK, people saying that have in mind that the refund & payment tx, which have as input the deposit tx (Dtx), could be invalid if the deposit’s hash was changed. I m fine with this.

What I don’t understand: if the attacker manages to modify Dtx’ hash before it made it to the blockchain, I believe (s)he can equally manage to double spend the btcs supposed to go to Dtx. Thus, double spend seems as much a threat as malleability. Yet no one discusses it, so I suppose something is wrong with this reasoning. What?

Thanks

Recent Questions – Bitcoin Stack Exchange

US Health Department Blockchain Research Contest Sees 15 Winners

15 winners have been selected by the Office of the National Coordinator for Health Information Technology (ONC), a division of the Department of Health and Human Services (HHS) following its blockchain research challenge. Announced last month, the HHS sought whitepapers as a part of the “Use of Blockchain in Health IT and Health-related Research Challenge”, […]

The post US Health Department Blockchain Research Contest Sees 15 Winners appeared first on CCN: Financial Bitcoin & Cryptocurrency News.

News – CCN: Financial Bitcoin & Cryptocurrency News

Bitcoin Price Consolidation Holds Course

Bitcoin price pulls lower toward horizontal support near $ 560. The outlook remains that the market is engaged in a sideways base formation prior to advance. This analysis is provided by xbt.social with a 3-hour delay. Read the full analysis here. Not a member? Join now. Bitcoin Price Analysis Time of analysis: 14h00 UTC Wednesday Bitstamp […]

The post Bitcoin Price Consolidation Holds Course appeared first on CCN: Financial Bitcoin & Cryptocurrency News.

News – CCN: Financial Bitcoin & Cryptocurrency News

Does MultiBit Classic assign a password or is it manually set?

I have a MultiBit Classic wallet that I have had since 08/2014 and for the life of me I can not remember the password, I honestly don’t even remember putting a password on it at the time.
My question is, would MultiBit assign a password automatically once bitcoins have been deposited into it?
I am stuck and I have tried every password that I could think of that I may have used.
Any help greatly appreciated
Cheers

Recent Questions – Bitcoin Stack Exchange