[cryptography] [Bitcoin-development] REWARD offered for hash collisions for SHA1, SHA256, RIPEMD160 and others

Adam Back adam at cypherspace.org
Mon Sep 16 13:04:07 EDT 2013


Mining power policy abuse (deciding which transactions prevail based on
compute power advantage for theft reasons, or political reasons, or taint
reasons) is what committed coins protect against:

https://bitcointalk.org/index.php?topic=206303.0

(Its just a proposal, its not implemented).

Adam

On Mon, Sep 16, 2013 at 05:21:42PM +0200, Lodewijk andré de la porte wrote:

> 1) We advise mining the block in which you collect your bounty yourself;
>    scriptSigs satisfying the above scriptPubKeys do not cryptographically sign
>    the transaction's outputs. If the bounty value is sufficiently large
>    other miners may find it profitable to reorganize the chain to kill your
>    block and collect the reward themselves.  This is particularly
>    profitable for larger, centralized, mining pools.
>
>> This is a big problem.


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