Grzegorz Wierzowiecki
  • Member for 9 years, 8 months
  • Last seen more than 1 year ago
  • Zürich, Switzerland
4 answers
1 votes
1k views
Do any cryptography algorithms work on numbers besides primes?
0 votes

Bitcoin blockchain cryptography algorithm is based on hash function. Finding next coin/block in block chain is equivalent to finding next payload resulting in hash having sufficient amount of leading ...

View answer
3 answers
1 votes
455 views
Should I use md5 for my new application?
1 votes

The only threats against MD5 are security, afaik it's mostly about its collision resistance (and some specific cases of preimage). If you rite that app is "non-security-sensitive", maybe you should ...

View answer
4 answers
9 votes
10k views
How are timestamps verified?
1 votes

As we find in answer http://answers.onstartups.com/a/41679/19173 , there are many methods of cryptographic Timestamping. Take a look for comparison of popular methods: https://en.wikipedia.org/wiki/...

View answer
4 answers
4 votes
3k views
Signature and Timestamp for Long Term Document Archival Question
0 votes

I would encourage to take a look and different Cryptographic Timestamping methods. My favourite schemes are: distributed, Linking-based and hybrid schemes like Linked and signed. The last one Linked ...

View answer