diff --git a/OneHundredYearCryptography.md b/OneHundredYearCryptography.md
index 780a047..faf1a0d 100644
--- a/OneHundredYearCryptography.md
+++ b/OneHundredYearCryptography.md
@@ -1,6 +1,6 @@
 See also [NewCapDesign](NewCapDesign) and [Bibliography](Bibliography).
 
-This describes a project to enhance Tahoe-LAFS's cryptographic system so that Tahoe shipped today/next year might remain safe from cryptographic attacks for a 100 years. The initial ideas were presented on a [post by Zooko on his klog](https://tahoe-lafs.org/~zooko/backup_of_klog/blog.html)#[[can%20we%20build%20a%20crypto%20system%20to%20last%20for%20a%20hundred%20years%3F%5D%5D.
+This describes a project to enhance Tahoe-LAFS's cryptographic system so that Tahoe shipped today/next year might remain safe from cryptographic attacks for a 100 years. The initial ideas were presented on a [post by Zooko on his klog](https://zooko.com/uri/URI%3ADIR2-MDMF-RO%3Ajf3sqg535zufb43iafx7fpmszq%3A7icvjsf6ltqr47jdaejvhpguqcfv53k5hqo5hwylquejqf5zkgba/blog.html)#[[can%20we%20build%20a%20crypto%20system%20to%20last%20for%20a%20hundred%20years%3F%5D%5D.
 
 One idea is to combine two primitives, both thought to be safe, such that even if one of them fails catastrophically Tahoe-LAFS remains secure.