3. Signatures

MIT MAS.S62 Cryptocurrency Engineering and Design, Spring 2018
Instructor: Tadge Dryja

Discussion of hash signatures, public and private keys, examples of how to use elliptic curves vs. hashes.

License: Creative Commons BY-NC-SA

[Sunny-tpro]

Such a great initiative by MIT to spread all this knowledge for free around the globe. Bless you guys!

[Esparzamx]

I feel like I'm watching Dora the explorer whenever I yell out the answer to the screen, great content, thank you!

[lambdapractitioner]

With RSA ... one needs to mind one's Ps and Qs,

[ecavero]

On the elliptic curves, G is called the Generator Point because the repeated addition of G to itself generate all the numbers in the cyclic group.

[randalllionelkharkrang]

i dont understand why signature for a 32 byte would have an 8K byte signature?
i think whats not clear to me, is that if u use 32 byte secretkey. we should actually have a 16 byte signature. but if my public key is 16kb. during verification, why would my signature size increase? when im literally just comparing each block of public key selected(depending on the hash of my message whether its 0 or 1, i would eventually get a 8 kb temp "object"). now just use the hash with index on signature right?

[vmalonbc]

When you double your public key in the first 3 minutes aren’t you still giving away half you private key every time you sign?

I can’t see why extending the public key to 32 bytes would allow for 1 more use.

[kevinrandalrulach]

I'm not getting most of the stuff, but I'm trying to assimilate atleast a bit.

[kevinrandalrulach]

I'm not getting most of the stuff, but I'm trying to assimilate atleast a bit. I have forgotten most stuff cos I was studying biology, brain and stuff.

[HashirPlayz]

@MIT OpenCourseWare can u share lecture 9 19 20 and 21 they are not available without those lecture (smat contracts and more) the course is not complete. so can u plzzz share those lectures

[hahneortiz]

How is it at 12:00 that we have a 32-byte private key?

[jordankuzmanovik]

Where can i find the presentation for lecture 3? Because on the website it poitns me to lecture 4.

Anyway great series,

[nomad]

35:00 the slide is wrong, it should read P+Q=R

[pakistan]

where can i find pset01?? the assignment?