This is cool! To really make the overhead tiny, include an inplace implementation of XTEA (under 1KB decryption). XTEA is not a military grade algo (but there'

This is cool! To really make the overhead tiny, include an inplace implementation of XTEA (under 1KB decryption). XTEA is not a military grade algo (but there's only been a partial attack on reduced rounds). All in all the overhead can come in under 2KB in all.