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Questions tagged [cryptography]

Concerning the broad subject of cryptography and its narrow application in Bitcoin protocol and applications.

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6
votes
1answer
440 views

Bitcoin Research

I have recently been assigned to advise a student on a senior thesis in math. She has taken linear algebra, introductory real analysis, basic cryptography, and abstract algebra. Her interest is in ...
0
votes
0answers
69 views

How secure is a private key? [duplicate]

Possible Duplicate: Is it possible to brute force bitcoin address creation in order to steal money? I've tried brainwallet.org and now I wonder, what happens if someone starts to generate a lot ...
65
votes
4answers
24k views

What is a compressed Bitcoin key?

The standard Bitcoin client in version 0.6 apparently introduces compressed keys. What are they? Are there any drawbacks to using them? Any incompatibilities with older software? Reductions in ...
-1
votes
1answer
437 views

How does a signed public key look different from an unsigned one? [closed]

I read this: "Public-key cryptography uses key pairs, a public and a private one, that can be generated by a user at any time. As the name implies, the public key gets distributed, while the private ...
3
votes
1answer
543 views

How do we have one-to-one mapping given the key size differences?

If public keys are 34 characters long, and private keys are 61 characters long, then the combinations of 34 characters is not sufficient to give each combination of 61 characters a unique pair. My ...
6
votes
4answers
913 views

Is it possible to forward bitcoins without the private keys?

According to this question, there isn't an easy way to automatically send bitcoins from one address to another and I think that it might be useful. So I thought about creating a website were people ...
55
votes
4answers
7k views

Have any cryptography experts vetted the bitcoin source code?

Theoretically, bitcoin's open source nature makes it more resistant to bugs and exploits. However, due to the specialized nature of the code, even many programmers don't fully understand the ...