« Return to Thread: Timestamps and Hashes

Timestamps and Hashes

by mkl :: Rate this Message:

Hi!

When I looked at PdfPKCS7.java, I found:

// When requested, go get and add the timestamp. May throw an exception.
// Added by Martin Brunecky, 07/12/2007 folowing Aiken Sam, 2006-11-15
// Sam found Adobe expects time-stamped SHA1-1 of the encrypted digest
if (tsaClient != null) {
byte[] tsImprint = MessageDigest.getInstance("SHA-1").digest(digest);

Is SHA-1 actually still required by Adobe? The information from Sam might be a bit outdated, especially as SHA-1 is not really state-of-the-art anymore...

Regards, Michael.

« Return to Thread: Timestamps and Hashes