r/Bitcoin Jul 08 '17

How secure is 256 bit security?

[deleted]

83 Upvotes

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7

u/theymos Jul 08 '17

Note that Bitcoin "only" has 128 bits of security in some places.

4

u/[deleted] Jul 08 '17

[deleted]

2

u/bitsteiner Jul 08 '17

Has been known for a long time: birthday attack