55 research outputs found
Análise quantitativa do sistema primário de laticĂferos do caule de plantas jovens de clone e pĂ©s-francos de seringueira
Signatures courtes sur chiffrés randomizables
International audienceRandomizable encryption lets anyone randomize a ciphertext so it is distributed like a fresh encryption of the same plaintext. Signatures on randomizable cipher-texts (SoRC), introduced by Blazy et al. (PKC'11), let one adapt a signature on a ciphertext to a randomization of the latter. Since signatures can only be adapted to ciphertexts that encrypt the same message as the signed ciphertext, signatures obliviously authenticate plaintexts. SoRC have been used as a building block in e-voting, blind signatures and (delegatable) anonymous credentials. We observe that SoRC can be seen as signatures on equivalence classes (JoC'19), another primitive with many applications to anonymous authentication, and that SoRC provide better anonymity guarantees. We first strengthen the unforgeability notion for SoRC and then give a scheme that provably achieves it in the generic group model. Signatures in our scheme consist of 4 bilinear-group elements, which is considerably more efficient than prior schemes
TRANSLOCATION IN POLYTRICHUM COMMUNE (BRYOPHYTA). III. LOADING OF SUGARS IN SOURCE LEAVES
Polarized accumulations of endoplasmic reticulum and other ultrastructural features of leptoids inPolytrichadelphus magellanicus gametophytes
Acid phosphomonoesterase activities (?-glycerophosphatase and naphthol AS-MX phosphatase) in conducting tissues of bryophytes
Studies on the development of the conducting tissue-system in the gametophytes of somePolytrichales
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