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### LFSR Tap sequence 15 bit LFSR

I have been asked to create an LFSR with a polynomial of x^15 + x + 1 and i am confused where the tap sequence would go. The examples I was given show a 4 bit tap sequence with two polynomials: x^3 + ...
89 views

### What (Where) is the formal definition of Multiparty Computation? [closed]

I'm just curious where we can see a (original) formal definition of MPC. What (Where) is the formal definition of MPC? We have a bunch of tools to build a MPC protocol. Is oblivious transfer (or OT-...
600 views

### Which is slower, AES or GCM hash (GHASH), if CPU has no special instructions?

In an answer to this question: Security of GCM if Implemented with Stream Cipher instead of Block Cipher ...it was stated that: The GHASH part of GCM is usually the problematic one when it comes to ...
520 views

### Zero knowledge proof for identity

Quoting a blog authored by Vitalik Buterin regarding ZKP and Ethereum One natural use case for the technology is in identity systems. For example, suppose that you want to prove to a system that ...
168 views

### RSA: How effective is this keypair-trash attack [duplicate]

A question that could very well be part of xkcd's "what if?": Let's say Monica made a piece of software that sends all RSA keypairs to a central database after they're not used anymore. Something ...
2k views

### Stream Cipher : Never use stream cipher key more than once [duplicate]

Possible Duplicate: Taking advantage of one-time pad key reuse? How does one attack a two-time pad (i.e. one time pad with key reuse)? Denote C is cipher text, m is message, and PRG(k) is a ...
338 views