136 reputation
4
bio website
location
age
visits member for 2 years, 8 months
seen Mar 26 at 13:39

Mar
26
answered Questions about hash functions
Mar
26
comment Lamport signature: How many signatures are need to forge a signature?
This is only true if the user signs random messages. If the attacker is allowed to choose the messages it uses the all 0 and the all 1 message and learns all secret key values... And the common model for security of signature schemes allows the attacker to choose the messages....
Mar
26
answered Asymmetric key derivation – Who derives the new pub key can't know the new private key
Aug
28
comment Fractal Merkle Traversal
The $ih$ is the offset of the subtree, i.e. $ih+0$ are the leaves of the subtree, $ih+1$ are the nodes on level $1$ in the subtree, and so on.
Aug
27
answered Is there a public key encryption scheme with optimal key size?
Aug
27
comment Fractal Merkle Traversal
"...and assume this tree of height 3 is our exist subtree." Yes, h=3
Aug
26
awarded  Revival
Aug
26
answered Quantum resistance of Lamport signatures
Aug
26
awarded  Supporter
Aug
26
awarded  Editor
Aug
26
revised Fractal Merkle Traversal
Clearified what first means
Aug
26
comment Fractal Merkle Traversal
That's right, but the root nodes of subtrees are never computed as they are leaves of the next subtree (See p.49 - "Static view"). That's why I choose a different example.
Aug
23
answered Fractal Merkle Traversal
Oct
26
answered Endless PRNG from PRNG with specific stretch?
Aug
12
awarded  Teacher
Aug
12
answered How can I improve a password generation scheme based on a shared secret and URL?
Aug
12
answered What is entropy?