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A comment on Service lets you "certify" a document using the Bitcoin blockchain.

Re:Service lets you "certify" a document using the Bitcoin b... by eddywebs on Wednesday November 27, 2013 @01:57PM (#6810255)
nice concept ! apparently sha-1 is vulnerable to collisions (http://eprint.iacr.org/2008/469.pdf) how are they handled ?
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Re:Service lets you "certify" a document using the Bitcoin b... by sp332 on Wednesday November 27, 2013 @02:49PM (#6810620)
It uses SHA-256, not SHA-1.
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Re:Service lets you "certify" a document using the Bitcoin b... by darky3041 on Wednesday November 27, 2013 @02:06PM (#6810332)
By using SHA-2?
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Re:Service lets you "certify" a document using the Bitcoin b... by kcbanner on Wednesday November 27, 2013 @02:05PM (#6810325)
Excuse me?
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