By concatenating checksums in new blocks, old blocks are protected against manipulation. The TrustChain extends this procedure by allowing new blocks to be accepted only with the prior knowledge from the previous blocks.
In the near future, quantum computers could render existing security methods useless. Today’s secure encryption methods can then be cracked by these computing systems within seconds.
The solution is crypto-agility: flexible and agile protocols and their updates can prepare for this scenario already now. You should never ignore this and not switch over after it is too late.
Our solutions are crypto-agile, so you are already on the safe side when quantum computers become accessible.