I was going through some ancient backups and came across my original PGP 2.X 
keys from way back in the day.  Back then, many of us worked hard to collect 
signatures to establish a web of trust.  Of course this was ages ago now and as 
things have evolved, I’m now using newer keys.  I’m not sure why this hadn’t 
occurred to me until now, but in migrating to newer keys, all those old 
signatures were lost.  To be fair, I’m sure that most of those signatures could 
no longer be validated anyway since I’m sure everyone has moved on, but it got 
me thinking about the web of trust: Is that something people really even focus 
on any more? Also, how can the web of trust remain intact when there will 
inevitably come a time when key structures/algorithms will change again and 
people will need to generate new keys?  What about key expiration, wouldn’t 
that cause a person to essentially have to start over with gathering signatures 
for new keys, or otherwise re-establishing trust?

I’m sure I’m missing something very basic, but would really appreciate any 
thoughts or explanation.  

Thanks in advance,

Steve


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