How to identify encryption algorithm used in ciphertext?

Question

Is there any ways to try to guess encryption algorithm used to encrypt the ciphertext?

Answer 1

You can try fbcrypt which will scan for known hash & crypto signatures: http://fwhacking.blogspot.com/2011/03/bfcrypt-crypto-scanner.html

For now it supports MD5, CRC32, Blowfish, DES and SHA256, but more will be added soon. Anyway as the source is available you can also add your own.