13.78126

there’s apparently technical guidelines¹ that talk about turning random bits into random numbers between 0 and something other than powers of two. unfortunately it’s lacking a bit of nuance.

• cryptography
• random number generation

13.77934

i’ve been wanting a good way to migrate signature keys in converge. ideally a migrating key pair that:

1. signatures can be verified correct with merely the signing public key
2. the migrating secret cannot be derived from the signing secret key
3. even if the migrating public key is known

• converge
• signatures
• cryptography

e2ee for twitter dms?

yesterday, twitter rolled out encrypted direct messages.

their help page listed some glaring limitations, so i wanted to take a look inside.

• cryptography
• end to end encryption

13.76468

the usual use of the shared secret from a diffie-hellman key exchange is as a symmetric encryption key. of course, there’s nothing preventing anyone from using it as a secret key for a signing algorithm instead.

• converge
• cryptography