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This paper proposes a new
involutive light-weight block cipher for resource-constraint environments
called I-PRESENTTM. The design is based on the Present block cipher
which is included in the ISO/IEC 29192 standard on lightweight cryptography.
The advantage of I-PRESENTTM is
that the cipher is involutive such that the encryption circuit is identical to
decryption. This is an advantage for environments which require the
implementation of both circuits. The area requirement of I-PRESENTTM compares reasonably well with
other similar ciphers such as PRINCE.