Elliptic curves in tinc

folkert folkert at vanheusden.com
Fri Sep 20 11:00:40 CEST 2013


6 core (with HT) i7:

folkert at neo:~$  openssl speed ecdsap521 ecdsak571 ecdhp521 ecdhk571
Doing 521 bit sign ecdsa's for 10s: 24113 521 bit ECDSA signs in 10.00s
Doing 521 bit verify ecdsa's for 10s: 4931 521 bit ECDSA verify in
10.00s
Doing 571 bit sign ecdsa's for 10s: 3350 571 bit ECDSA signs in 10.00s
Doing 571 bit verify ecdsa's for 10s: 1808 571 bit ECDSA verify in
10.01s
Doing 521 bit  ecdh's for 10s: 6193 521-bit ECDH ops in 10.00s
Doing 571 bit  ecdh's for 10s: 3879 571-bit ECDH ops in 10.00s
OpenSSL 1.0.1e 11 Feb 2013
built on: Mon Mar 18 20:41:20 CET 2013
options:bn(64,64) rc4(16x,int) des(idx,cisc,16,int) aes(partial)
blowfish(idx)
compiler: gcc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT
-DDSO_DLFCN -DHAVE_DLFCN_H -m64 -DL_ENDIAN -DTERMIO -g -O2
-fstack-protector --param=ssp-buffer-size=4 -Wformat
-Werror=format-security -D_FORTIFY_SOURCE=2 -Wl,-z,relro
-Wa,--noexecstack -Wall -DMD32_REG_T=int -DOPENSSL_IA32_SSE2
-DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m
-DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM
-DBSAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM
                              sign    verify    sign/s verify/s
 521 bit ecdsa (nistp521)   0.0004s   0.0020s   2411.3    493.1
 571 bit ecdsa (nistk571)   0.0030s   0.0055s    335.0    180.6
                              op      op/s
 521 bit ecdh (nistp521)   0.0016s    619.3
 571 bit ecdh (nistk571)   0.0026s    387.9


vendor_id       : GenuineIntel
cpu family      : 6
model           : 45
model name      : Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz
stepping        : 7
microcode       : 0x70d
cpu MHz         : 3488.000
cache size      : 12288 KB
physical id     : 0
siblings        : 12
core id         : 5
cpu cores       : 6
apicid          : 11
initial apicid  : 11
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe
syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good
nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64
monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2
x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat epb
xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid
bogomips        : 6399.95
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

----
asus eee pc 905:

root at ieieie:~#  openssl speed ecdsap521 ecdsak571 ecdhp521 ecdhk571
Doing 521 bit sign ecdsa's for 10s: 1378 521 bit ECDSA signs in 9.99s
Doing 521 bit verify ecdsa's for 10s: 243 521 bit ECDSA verify in 10.02s
Doing 571 bit sign ecdsa's for 10s: 281 571 bit ECDSA signs in 10.00s
Doing 571 bit verify ecdsa's for 10s: 79 571 bit ECDSA verify in 10.00s
Doing 521 bit  ecdh's for 10s: 286 521-bit ECDH ops in 9.99s
Doing 571 bit  ecdh's for 10s: 159 571-bit ECDH ops in 10.04s
OpenSSL 1.0.1c 10 May 2012
built on: Sun Jul 29 13:19:44 UTC 2012
options:bn(64,32) rc4(8x,mmx) des(ptr,risc1,16,long) aes(partial)
blowfish(idx)
compiler: gcc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT
-DDSO_DLFCN -DHAVE_DLFCN_H -DL_ENDIAN -DTERMIO -g -O2 -fstack-protector
--param=ssp-buffer-size=4 -Wformat -Werror=format-security
-D_FORTIFY_SOURCE=2 -Wl,-z,relro -Wa,--noexecstack -Wall -march=i686
-DOPENSSL_BN_ASM_PART_WORDS -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT
-DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM
-DRMD160_ASM -DAES_ASM -DVPAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM
                              sign    verify    sign/s verify/s
 521 bit ecdsa (nistp521)   0.0072s   0.0412s    137.9     24.3
 571 bit ecdsa (nistk571)   0.0356s   0.1266s     28.1      7.9
                              op      op/s
 521 bit ecdh (nistp521)   0.0349s     28.6
 571 bit ecdh (nistk571)   0.0631s     15.8

2 cores of ht

vendor_id       : GenuineIntel
cpu family      : 6
model           : 28
model name      : Intel(R) Atom(TM) CPU N270   @ 1.60GHz
stepping        : 2
cpu MHz         : 800.000
cache size      : 512 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 1
apicid          : 1
initial apicid  : 1
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
wp              : yes
flags           : fpu vme de tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc
arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3
xtpr pdcm movbe lahf_lm
bogomips        : 3199.99
clflush size    : 64
cache_alignment : 64
address sizes   : 32 bits physical, 32 bits virtual
power management:


---
server:/home/folkert# cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 2
model name      : Intel(R) Pentium(R) 4 CPU 2.66GHz
stepping        : 9
microcode       : 0x17
cpu MHz         : 2657.704
cache size      : 512 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe up
pebs bts cid xtpr
bogomips        : 5315.40
clflush size    : 64
cache_alignment : 128
address sizes   : 36 bits physical, 32 bits virtual
power management:

server:/home/folkert# openssl speed ecdsap521 ecdsak571 ecdhp521
ecdhk571
Doing 521 bit sign ecdsa's for 10s: 2339 521 bit ECDSA signs in 9.61s
Doing 521 bit verify ecdsa's for 10s: 446 521 bit ECDSA verify in 9.82s
Doing 571 bit sign ecdsa's for 10s: 363 571 bit ECDSA signs in 9.71s
Doing 571 bit verify ecdsa's for 10s: 139 571 bit ECDSA verify in 9.88s
Doing 521 bit  ecdh's for 10s: 519 521-bit ECDH ops in 9.77s
Doing 571 bit  ecdh's for 10s: 286 571-bit ECDH ops in 9.82s
OpenSSL 0.9.8o 01 Jun 2010
built on: Tue Apr 24 22:38:48 UTC 2012
options:bn(64,32) md2(int) rc4(idx,int) des(ptr,risc1,16,long)
aes(partial) blowfish(idx)
compiler: gcc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT
-DDSO_DLFCN -DHAVE_DLFCN_H -DL_ENDIAN -DTERMIO -O3 -march=i686
-Wa,--noexecstack -g -Wall -DOPENSSL_BN_ASM_PART_WORDS
-DOPENSSL_IA32_SSE2 -DSHA1_ASM -DMD5_ASM -DRMD160_ASM -DAES_ASM
available timing options: TIMES TIMEB HZ=100 [sysconf value]
timing function used: times
                              sign    verify    sign/s verify/s
 521 bit ecdsa (nistp521)   0.0041s   0.0220s    243.4     45.4
 571 bit ecdsa (nistk571)   0.0267s   0.0711s     37.4     14.1
                              op      op/s
 521 bit ecdh (nistp521)   0.0188s     53.1
 571 bit ecdh (nistk571)   0.0343s     29.1

---
folkert at server1:~> openssl speed ecdsap521 ecdsak571 ecdhp521 ecdhk571
Doing 521 bit sign ecdsa's for 10s: 6334 521 bit ECDSA signs in 9.98s
Doing 521 bit verify ecdsa's for 10s: 1148 521 bit ECDSA verify in 9.96s
Doing 571 bit sign ecdsa's for 10s: 853 571 bit ECDSA signs in 10.01s
Doing 571 bit verify ecdsa's for 10s: 256 571 bit ECDSA verify in 9.99s
Doing 521 bit  ecdh's for 10s: 1364 521-bit ECDH ops in 9.99s
Doing 571 bit  ecdh's for 10s: 524 571-bit ECDH ops in 10.00s
OpenSSL 1.0.1e 11 Feb 2013
built on: Thu Apr 25 12:38:24 CEST 2013
options:bn(64,32) rc4(8x,mmx) des(ptr,risc1,16,long) aes(partial)
idea(int) blowfish(idx)
compiler: gcc -fPIC -DOPENSSL_PIC -DOPENSSL_THREADS -D_REENTRANT
-DDSO_DLFCN -DHAVE_DLFCN_H -Wa,--noexecstack -DL_ENDIAN -DTERMIO -O3
-fomit-frame-pointer -Wall -DOPENSSL_BN_ASM_PART_WORDS
-DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_GF2m
-DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DRMD160_ASM -DAES_ASM
-DVPAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM
                              sign    verify    sign/s verify/s
 521 bit ecdsa (nistp521)   0.0016s   0.0087s    634.7    115.3
 571 bit ecdsa (nistk571)   0.0117s   0.0390s     85.2     25.6
                              op      op/s
 521 bit ecdh (nistp521)   0.0073s    136.5
 571 bit ecdh (nistk571)   0.0191s     52.4

processor       : 15
vendor_id       : GenuineIntel
cpu family      : 6
model           : 26
model name      : Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
stepping        : 5
microcode       : 0xf
cpu MHz         : 2261.204
cache size      : 8192 KB
physical id     : 0
siblings        : 8
core id         : 3
cpu cores       : 4
apicid          : 7
initial apicid  : 7
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx
rdtscp lm constant_tsc arch_perfmon pebs bts xtopology nonstop_tsc
aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm
dca sse4_1 sse4_2 popcnt lahf_lm ida dtherm tpr_shadow vnmi flexpriority
ept vpid
bogomips        : 4521.97
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:

---
openssl speed ecdsap521 ecdsak571 ecdhp521 ecdhk571
Doing 521 bit sign ecdsa's for 10s: 9415 521 bit ECDSA signs in 9.90s 
Doing 521 bit verify ecdsa's for 10s: 1684 521 bit ECDSA verify in 9.99s
Doing 571 bit sign ecdsa's for 10s: 1312 571 bit ECDSA signs in 9.99s 
Doing 571 bit verify ecdsa's for 10s: 662 571 bit ECDSA verify in 10.00s
Doing 521 bit  ecdh's for 10s: 2056 521-bit ECDH ops in 9.98s
Doing 571 bit  ecdh's for 10s: 1320 571-bit ECDH ops in 9.99s
OpenSSL 1.0.1 14 Mar 2012
built on: Mon Apr 15 15:27:09 UTC 2013
options:bn(64,32) rc4(8x,mmx) des(ptr,risc1,16,long) aes(partial)
blowfish(idx) 
compiler: cc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT
-DDSO_DLFCN -DHAVE_DLFCN_H -DL_ENDIAN -DTERMIO -g -O2 -fstack-protector
--param=ssp-buffer-size=4 -Wformat -Wformat-security
-Werror=format-security -D_FORTIFY_SOURCE=2 -Wl,-Bsymbolic-functions
-Wl,-z,relro -Wa,--noexecstack -Wall -DOPENSSL_NO_TLS1_2_CLIENT
-DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 -DOPENSSL_BN_ASM_PART_WORDS
-DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_GF2m
-DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DRMD160_ASM -DAES_ASM
-DVPAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM
                              sign    verify    sign/s verify/s
 521 bit ecdsa (nistp521)   0.0011s   0.0059s    951.0    168.6
 571 bit ecdsa (nistk571)   0.0076s   0.0151s    131.3     66.2
                              op      op/s
 521 bit ecdh (nistp521)   0.0049s    206.0
 571 bit ecdh (nistk571)   0.0076s    132.1

vendor_id	: GenuineIntel
cpu family	: 6
model		: 37
model name	: Intel(R) Core(TM) i5 CPU         650  @ 3.20GHz
stepping	: 5
microcode	: 0x2
cpu MHz		: 3333.000
cache size	: 4096 KB
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss nx rdtscp
constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc
aperfmperf pni pclmulqdq ssse3 sse4_1 sse4_2 x2apic popcnt aes
hypervisor ida arat dtherm
bogomips	: 6666.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

---

Doing 521 bit sign ecdsa's for 10s: 7140 521 bit ECDSA signs in 9.97s 
Doing 521 bit verify ecdsa's for 10s: 1356 521 bit ECDSA verify in 9.98s
Doing 571 bit sign ecdsa's for 10s: 1045 571 bit ECDSA signs in 9.98s 
Doing 571 bit verify ecdsa's for 10s: 538 571 bit ECDSA verify in 9.98s
Doing 521 bit  ecdh's for 10s: 1787 521-bit ECDH ops in 9.98s
Doing 571 bit  ecdh's for 10s: 1003 571-bit ECDH ops in 9.97s
OpenSSL 1.0.1 14 Mar 2012
built on: Tue Jun  4 07:25:48 UTC 2013
options:bn(64,32) rc4(8x,mmx) des(ptr,risc1,16,long) aes(partial)
blowfish(idx) 
compiler: cc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT
-DDSO_DLFCN -DHAVE_DLFCN_H -DL_ENDIAN -DTERMIO -g -O2 -fstack-protector
--param=ssp-buffer-size=4 -Wformat -Wformat-security
-Werror=format-security -D_FORTIFY_SOURCE=2 -Wl,-Bsymbolic-functions
-Wl,-z,relro -Wa,--noexecstack -Wall -DOPENSSL_NO_TLS1_2_CLIENT
-DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 -DOPENSSL_BN_ASM_PART_WORDS
-DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_GF2m
-DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DRMD160_ASM -DAES_ASM
-DVPAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM
                              sign    verify    sign/s verify/s
 521 bit ecdsa (nistp521)   0.0014s   0.0074s    716.1    135.9
 571 bit ecdsa (nistk571)   0.0096s   0.0186s    104.7     53.9
                              op      op/s
 521 bit ecdh (nistp521)   0.0056s    179.1
 571 bit ecdh (nistk571)   0.0099s    100.6


vendor_id	: GenuineIntel
cpu family	: 6
model		: 37
model name	: Intel(R) Xeon(R) CPU           X5650  @ 2.67GHz
stepping	: 1
microcode	: 0x13
cpu MHz		: 2660.000
cache size	: 12288 KB
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss nx rdtscp lm
constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc
aperfmperf pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 popcnt aes hypervisor
lahf_lm ida arat dtherm
bogomips	: 5320.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:




On Fri, Sep 20, 2013 at 10:48:27AM +0200, folkert wrote:
> > second on low-powered devices. By the way, if you are running tinc on
> > low-powered devices, please run "openssl speed ecdsap521 ecdsak571 ecdhp521
> > ecdhk571" and send me the results.
> 
> On a Nanos G20:
> 
> folkert at time5:~$ openssl speed ecdsap521 ecdsak571 ecdhp521 ecdhk571
> Doing 521 bit sign ecdsa's for 10s: 120 521 bit ECDSA signs in 5.00s
> Doing 521 bit verify ecdsa's for 10s: 23 521 bit ECDSA verify in 5.02s
> Doing 571 bit sign ecdsa's for 10s: 28 571 bit ECDSA signs in 5.07s
> Doing 571 bit verify ecdsa's for 10s: 7 571 bit ECDSA verify in 5.62s
> Doing 521 bit  ecdh's for 10s: 28 521-bit ECDH ops in 5.13s
> Doing 571 bit  ecdh's for 10s: 13 571-bit ECDH ops in 5.11s
> OpenSSL 1.0.1e 11 Feb 2013
> built on: Mon Mar 18 21:53:12 UTC 2013
> options:bn(64,32) rc4(ptr,char) des(idx,cisc,16,long) aes(partial)
> blowfish(ptr)
> compiler: gcc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT
> -DDSO_DLFCN -DHAVE_DLFCN_H -DL_ENDIAN -DTERMIO -g -O2 -fstack-protector
> --param=ssp-buffer-size=4 -Wformat -Werror=format-security
> -D_FORTIFY_SOURCE=2 -Wl,-z,relro -Wa,--noexecstack -Wall
>                               sign    verify    sign/s verify/s
>  521 bit ecdsa (nistp521)   0.0417s   0.2183s     24.0      4.6
>  571 bit ecdsa (nistk571)   0.1811s   0.8029s      5.5      1.2
>                               op      op/s
>  521 bit ecdh (nistp521)   0.1832s      5.5
>  571 bit ecdh (nistk571)   0.3931s      2.5
> 
> 
> folkert at time5:~$ cat /proc/cpuinfo
> Processor       : ARM926EJ-S rev 5 (v5l)
> BogoMIPS        : 197.01
> Features        : swp half thumb fastmult edsp java
> CPU implementer : 0x41
> CPU architecture: 5TEJ
> CPU variant     : 0x0
> CPU part        : 0x926
> CPU revision    : 5
> 
> Hardware        : NanosG20
> Revision        : 0000
> Serial          : 0000000000000000
> 
> 
> Raspberry PI model B:
> 
> folkert at incontrol ~ $ openssl speed ecdsap521 ecdsak571 ecdhp521
> ecdhk571
> Doing 521 bit sign ecdsa's for 10s: 686 521 bit ECDSA signs in 9.78s
> Doing 521 bit verify ecdsa's for 10s: 129 521 bit ECDSA verify in 9.99s
> Doing 571 bit sign ecdsa's for 10s: 87 571 bit ECDSA signs in 8.05s
> Doing 571 bit verify ecdsa's for 10s: 25 571 bit ECDSA verify in 7.95s
> Doing 521 bit  ecdh's for 10s: 148 521-bit ECDH ops in 9.77s
> Doing 571 bit  ecdh's for 10s: 63 571-bit ECDH ops in 9.93s
> OpenSSL 1.0.1e 11 Feb 2013
> built on: Sun Mar 24 12:44:00 UTC 2013
> options:bn(64,32) rc4(ptr,char) des(idx,cisc,16,long) aes(partial)
> blowfish(ptr)
> compiler: gcc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT
> -DDSO_DLFCN -DHAVE_DLFCN_H -DL_ENDIAN -DTERMIO -g -O2 -fstack-protector
> --param=ssp-buffer-size=4 -Wformat -Werror=format-security
> -D_FORTIFY_SOURCE=2 -Wl,-z,relro -Wa,--noexecstack -Wall
> -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM
> -DSHA512_ASM -DAES_ASM -DGHASH_ASM
>                               sign    verify    sign/s verify/s
>  521 bit ecdsa (nistp521)   0.0143s   0.0774s     70.1     12.9
>  571 bit ecdsa (nistk571)   0.0925s   0.3180s     10.8      3.1
>                               op      op/s
>  521 bit ecdh (nistp521)   0.0660s     15.1
>  571 bit ecdh (nistk571)   0.1576s      6.3
> 
> folkert at incontrol ~ $ cat /proc/cpuinfo
> processor       : 0
> model name      : ARMv6-compatible processor rev 7 (v6l)
> BogoMIPS        : 2.00
> Features        : swp half thumb fastmult vfp edsp java tls
> CPU implementer : 0x41
> CPU architecture: 7
> CPU variant     : 0x0
> CPU part        : 0xb76
> CPU revision    : 7
> 
> Hardware        : BCM2708
> Revision        : 000e
> Serial          : 00000000475466e5
> 
> 
> Folkert van Heusden
> 
> -- 
> www.TrustedTimestamping.com is a service that enables you to show that
> at a certain point in time, you had access to a hash-value reflecting
> the contents of a file (this file can be a word document, a jpeg
> image, everything).
> ----------------------------------------------------------------------
> Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com


Folkert van Heusden

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