IEEE P1363 :
TSH-ESIGN: Efficient Digital Signature Scheme Using Trisection Size Hash
[…] more efficient than any representative signature scheme such as elliptic curve and RSA based signature schemes. Moreover, TSH-ESIGN is provably secure in the strongest sense (existentially unforgeable against adaptive chosen message attacks) in the random oracle model […]

draft-eastlake-additional-xmlsec-uris-00.txt :
2.3.7 ESIGN-SHA1
The ESIGN algorithm specified in [IEEE P1363a] is a signature scheme
based on the integer factorization problem. It is much faster than
previous digital signature schemes so ESIGN can be implemented on
smart cards without special co-processors.