Higher order eTCR hash functions
We study higher order eTCR (enhanced target collision resistance) hash functions, where r r th-order eTCR is denoted by eTCR(r) ( r ) . We prove that a few rounds of the MD (MerkleDamgrd) scheme and a few levels of the TR (tree) scheme can be eTCR under the compression function is eTCR(r) ( r ) for some positive integer r r . Additionally, we prove that the TH (tree hash) scheme also preserves eTCR.
higher order etcr hash functions enhanced target collision resistance merkledamgrd scheme