I have a few questions regarding universal-hash functions:
- Is there a way universal hash functions can be used to provide unconditional authentication in the way the OTP provides unconditional security?
- Assuming a TRNG is used how could this be combined to form a perfect cryptosystem, assuming PSK's are secured?
- Is there unconditional non-repudiation(acceptance by third-party) to go along with this?
- And lastly, why are these hash functions not used as a SHA-#?